Youre going to be happy with whichever you buy, as long as you compare, and just go for the features you really want.
My current, and first, gps is the eTrex Legend. I love it. Has a decent base road map set and internal memory. Very nice size. Feels like a cell phone in my hand, and the button placement if very comfortable and ergonomic.
I used this page A LOT when deciding which one I wanted to go for. Being my first gps, I didnt go all out for the most pricy of course.
My time, your time is limited, but time itself is unlimited.