Garmin's 450T GPS is their highest end without an integrated camera, and so, the best discrete outdoor GPS they make. It has a barometer, altimeter, waterproofness, tilt-compensated compass and a receiver sensitive enough for quick fixes in canyons and forests.

The 450 has a 3-inch, 240 x 400 pixel screen, 850MB of internal memory and a MicroSD slot. It works off AAs but with lithium or NiMH cells you can get 16 hours of life. There's a $400 450 model (lacking the t, which is $500) that misses the full payload of North American topographical maps, covering "major trails, urban and rural roads, interstates, highways, coastlines, rivers and lakes as well as national, state and local parks, forests and wilderness areas".

I'm all about cheap, internet enabled smartphone GPS apps for walking and turn by turn, but for the serious outdoorsman who doesn't want to risk ruining or running down batteries in their phone, and wants a full payload of maps for when the internet goes down over the north side of that big mountain, this $500 outdoor GPS seems like the one to have. But man, think about how much smartphone and GPS app $500 buys you these days. You'd have to be really, really serious about the outdoors these days to get a device like this. I'm personally on the fence.