Im a great lover of my little eMAP. Its got the latest firmware on, while it doesnt have the same capabilities of more modern machines (such as being able to take standard memory cards, no proper floating compass etc), for its price I was more than happy with it. Ive been caching with it for over a year, and cant think of any reason I would need to upgrade.
Its a basic mapping machine (wonderful when loaded with the streetmaps), with the addition of the neoprene cover, its semi waterproof and has been into quite a few adventures and rugged caches over its time with me.
Battery life is pretty good considering, and its slim enough to fit in a shirt pocket.
I must admit also, that when i first started caching, I went with a friend who had a GPS12 and the eMAP simply blew it away...
He's now got a Magplat, which Ill grant you is an excellent piece of kit, but still a little chunky compared to the sleek lines of the eMAP..
You wont go far wrong with it..