Can anyone recommend me a good GPS for outdoor use? I looking for one to do some geocaching and taking in the back country on fire roads, trails, etc. It needs to be rugged and waterproof, so I don't think any of the car only units would suffice. I'd also like to be able to run topographic maps, too. My price range is up to $500, which would get me just about any normal consumer GPS, but I'm looking for specific recommendations. I'm shying away from the Garmin Oregons and other touchscreen type units because they don't seem durable enough for tough, extended outdoor use. I've also read of screen brightness and readability problems with the Oregon. Also, that it's not as accurate as Garmin's older 60CS series and the battery life is poor. Yet everyone seems to rave about them, but I doubt they are "hardcore" users.