Hey folks, I am about to buy a new GPS for my bike and I have spent countless hours researching all of the units on this site and on others. I think I have it narrowed down and want some custom opinions now. I want a color screen, I want it to be easily readable while riding my bike (so it needs to be a decent size), and I need it to have batteries so I can easily use the unit for many different applications. The 2610 is hard-wire only so I have ruled it out. I am down to the Quest and the SPIII, I am finding them for very similar prices and they both seem to be pretty nice units. Am I missing anything else? I don't really want to spend more than $500-600 on a unit, and I need it to include the City Select mapping software. Just wanted to hear your opinions since many of you have used these units and it will be the first time for me. Thanks a lot!