Been using a now discontinued Garmin 60csx for several years and have been extremely happy with it. The landowner chip for the state you are hunting is the only way to go for all the reasons listed above.
With that being said, I just picked up a Garmin Rino 650. Weighs less than my 60csx when you add in the small 2 way radio I usually carry. Being able to keep track of my hunting partner (and vice versa) seems like a good idea. Cabelas had them on sale for 329.00.
