I have a Garmin 60CSx. It is quite full-featured and very readable. I do not, as yet connect it to my camera directly, (although with a couple of adapter cables you can do this) but have used "Photo Tracker" software that coordinates the time stamps (camera and gps) and, in post processing, can identify the location where the picture is shot.

I mainly have it to assist me in hikes at new, unlearned locations, to get home before people start worrying about me.