Mobile navigation devices - recommendations

[Chevy454]

My wife/kids got me a Garmin "Quest" pocket GPS navigator for Father's Day...sounded like a cool piece, until I got to setting it up, and now I'm not so pleased...it seems you have to upload any map you're wanting to use from the computer, and it has to be under 150mb...come to find out, 150mb gets me just into Illinois, and then it's done, and I'll have to grab the laptop and upload the maps for the next trip...handy.

So, anyone have one of these things and know what I'm wanting to do? We live in the MiddleOfNowhere, so it's gonna take 150mb just to get us to civilization where most people's trips start...it has a GPS built in, and I was thinking it would download the info as I drove...guess I was wrong!