Thanks everyone! Your comments all helped a lot!
DH and I read through this thread, and then looked at the monitors at Dick's and REI, and I think he was pretty clear on all the pros and cons of lower vs. higher model as well as coupon info. We have a $20 coupon for Dick's as well, so he can order from either website and get the same deal.
Miss Giggles, special thanks for pointing out that there were women's models. I do have a small wrist, and I think I would prefer the better fit.
I'll let you know what I end up with (after Christmas of course)!
Less rhetoric, more cowbell!