On our WI group we have largely standardized on the etrex 20 ($168 from Amazon) and the ridewithgps web site and osm maps. I've been using the GPSMap60cx for years with city navigator. You pay hugely for maps and have to buy a new copy for every device. OSM maps are free and fantastic.

I looked at the 800/810 and decided I didn't need nearly so many bike related features and didn't want to pay $400-plus. I wanted to be able to create tracks and routes, have a good moving map display, and trip computer functions. You can still collect a lot of stats (like total ascent, moving avgs, etc).

With http://ridewithgps.com/ you can create routes/tracks and load them directly into your garmin device. You can support as many Garmin units as you want and all the maps are free. It's so much better than what I'd been doing for years. Love it. And it turns out I could also load everything into my older GPSMap60cx from ridewithgps. I'm totally converted and intend to get maybe more etrex-20s for the family.

I plan to write up a guide on how to configure the device and use it with ridewithgps for our group. (So much simpler/cheaper now than what I used to have to do) I'll post here if anyone is interested.