So, I'm notoriously frugal. Some would say "Cheap", but I prefer "Frugal". I would like a new GPS that gives me the ability to add my own routes, is waterproof and will give me the options I need for Dual Sport Riding, without the hassle of constantly switching the device I'm using. My options? I can purchase a second hand Garmin Nuvi 550 with all the RAM mount accessories. From what I understand, the NUVI 550 can accept Garmin Topo maps, but not in the same detail that you'll get from an eTrex model. If I buy this used model, I save $100. That's a few tanks of gas. I can also purchase a brand new Garmin eTrex 30 - for $259. It doesn't include any mounts or other accessories. However, I can get the Topo Maps that will cover any of the dual sport riding that I will do and I can get City Navigator for it that will cover any street riding as well. Pros to the eTrex? It is brand new and comes with warranty. If you were going to do it, which would you buy, given the options presented? Thanks for you help! C.