You'll want to find one that has a chest strap (more accurate) and allows you to enter and track your age, weight, and gender if at all possible. They all do basically the same thing, you just want to look at the available models and see what has the extra features you want. If you don't want all that, you can pick up a decent one at Walmart for cheap.
Don't worry about a heart rate goal when working out; those "heart rate zones" are for curiosity purposes, not real training. HRMs are best for tracking, not goal-setting, in my opinion. If you have a medical condition, of course that's different, but you should be challenging yourself based on your exertion, not your heart rate.
Edited by: DRAGONCHILDE at: 3/4/2013 (10:20)