The one I got was a Polar M32. It was one of the rewards I got from using my credit card, otherwise I might have shopped around. The Polar has a lot of nice features, though, and it is easy to read. It was doubly worth it since I didn't have to pay for it
I didn't know there are strapless ones. I may have to look into one of those some day. If you end up getting it, let me know how you like it!