I should start by thanking everyone who's chimed in to all the threads on this topic. Like many here I've been fixated on finding the ideal ear protection/music listening setup for quite a while and have benefited from others input. Hopefully any rehashing I do is helpful by virtue of having multiple ideas in one place. Up until early last summer my best (performance/price) had been the ER6i's with stock, 3 flange silicone tips: good noise isolation, decent sound, fairly fuss-free install/fit and at a manageable price ($75 a couple years back if I remember correctly). I'd occasionally get my head turned by the custom molded options but could never justify the cost despite being very capable at rationalizing quality kit (Held, Vendramini, Motoport.....). And on those occasions when I did get tempted by customs, reports of poor fittings (helmet pressure?) in this forum and others gave me cold feet. That plus the fact that I do loose/break/forget these things more often than I'd want to spend for them at the custom molded price. So anyway, about 6 months ago my ER6i's go AWOL. Lost, lifted, I'm not sure, but regardless, I was back in the hunt and have discovered some new things from this latest processing that may help others. 1) Given my head and ear shape I need low profile headphones to avoid interference with my helmet. This is true, to some degree, for all of us who wear helmets. Even the ER6i's would occasionally cause me a little soreness in my ears after all day use or interact with my helmet in a way that would degrade the fit/performance despite always wearing a helmet liner (Buff) which minimizes interference. After loosing my ER6i's my quick-and-dirty replacement was a cheap ($25) pair of Phillips earphones which worked o.k but stuck out a little further than the ER6i's so they were a bit fussy to get and keep set properly. I experimented with aftermarket tips (Comply) with limited success but never was able to consistently duplicate the noise reduction of the ER6i's with any of the tips. After going through the summer with the Phillips I decided, based upon reviews in this thread, to try the ER hf5's. Unfortunately they stick way too far out of my ears with the only tips that provide a good seal which makes them unusable under a helmet (think: for sale). My next try and current set, the ME Electronics M6's (@ $27 shipped to my door), also recommended here, are fantastic in this regard. Very unobtrusive/low profile so once put in they stay put. I wore almost all my earphones with the wires up and over the ear, which these require, so that didn't take any getting used to. I find this method keeps small inadvertent wire tugs from ruining the fit/seal of the earphones. 2) After finding the best fitting tips on the M6's are the single flange silicone ones I augmented them with foam earplugs. I basically cut the foam earplug to just less than the silicone tip stem length, made a round hole centered down the foam earplug length and then slid this foam "donut" up under the silicone flange. This memory foam seems to "back up" the silicone creating a better seal to my ear canal. I haven't done an all day ride with this setup but have had them in over 4 hours at work with no discomfort. I'd say the noise isolation meets or exceeds the ER6i's. 3) A thin film of waterless hand soap on the silicone tip provides additional seal. It doesn't evaporate like water/saliva and it's surface tension bridges small gaps. I've heard of folks using lotion as well but I like the soap as my ears can always use cleaning and having a small container of waterless hand soap with me is convenient anyway. The quality of fit/seal has a huge impact on sound quality and comfort. The M6's are far from hi-end kit but with a good fit (and #4) they approximate the sound quality of the ER6i's. Even better actually. NOTE: Be aware of too much noise isolation as is mentioned often on these forums. 4) For those of you using iPhones (and possibly other makes of smart phones) as your sound source, consider using a hearing test app (uHear is free) to evaluate your hearing and then use an equalization app (EQ 10 is 99¢), customized to your hearing profile and preferences, for playback. Reportedly, the more hearing loss you have at certain frequencies the more the customized EQ playback profile will improve your sound experience. You can setup different profiles for different headphones: one for moto earbuds and another for your home, over-the-ear variety for instance. 5) And finally - something I've yet to try - consider casting your own custom earbuds with Sugru or the homemade equivalent - Silicone adhesive mixed with corn starch or talc. Search the web for specific method and material instructions. There's a lot out there. So in summary, for ~ $40, I'm with an easy-on/stay-in-place, comfortable, quality sounding, highly noise isolating setup that exceeds the ER6i's via: Cheap, low profile earbuds - $27 (M6's for instance but I suspect there are others that meet this criteria) Option: Buff ($30) or other helmet liner ($10) to further reduce earphone/helmet interference. Option: waterless hand soap - $1 worth for this purpose would last a long time Run earphone wires over the ear to minimize wire tugs effect on earphone fit/seal - $0 Cheap semi-custom ear tips (solution will vary per individual) - less than $1 for foam earplugs (as "backer") or aftermarket option - add $5. (or add less than $8 for silicone/starch mix + misc to cast your own custom eartips) Custom equalization playback app (if available) - $1 At this cost I can reproduce the whole setup annually if lost/stolen/broken and am, again, not inclined to invest in custom molded. In case anyone cares, I listen to all types of music for much of my day, every day, but am not a musician myself. Despite being satisfied with my current setup, I'll continue to follow these threads to keep up with other solutions and new developments. Sorry so long - good luck to everyone in their search!