I have the Nuvi 500 and absolutely love it..it is very nice having much of the information available to you as well as a way to guide you to the geocache..
My issue is with off roading..I haven't found a GPS system that meets my needs....and likely won't. So don't be afraid of the 500... It is 100 times better than the tom tom and nuvi 295w. My opinion only of course..As I have all three now.