While I like and still use my Garmin etrex vista, I now have a Delorme pn-40 (also a pn-30) After a huge learning curve at the computer, I find that I really like this thing. I also like the way it geocaches even though that is third or so on my list of what I do with it. The maps are great, I can download a lot of different styles from topo to aerial.
It is a battery hog but I have seen that the newer pn-60 is much more battery efficient than the older models.
They also sell a nice rechargeable battery for it.