Hey Tiny - Congrats on the good knee. I just got a garmin 401 for $160 - it is a little pricey but what I like is the fact that you can use it on any bike or while hiking. with the optional heart rate band it also can give you feed back on target fitness zones and such. I must admit though I don't have the band yet but it seems like a cool concept.
https://buy.garmin.com/shop/shop.do?pID=30026