I mostly use a Garmin eTrex 30. It has replaceable batteries, ANT+ for cadence and HRM, under $200 if you shop. It's a little fatter than the bike specific models, but it serves me well. I also have a Garmin Montana 600 that I use on my 'bent trike because of the larger screen, and sometimes on my touring bike. It also has the ANT+ capabilities and adds touchscreen (for better or worse), but it's a biggun. It's also my favorite for hunting.