That was what I was going to say!
I have a Garmin, with HRM, but I tend to ignore the HR bit (especially if I don't like what it's telling me!)
If you're flush, the 405 is the latest one (about £200), or there are the cheaper (but bigger and clunkier) 205 and 305.
Amazon and BHIP have the best prices for any of the above.
Edited: 05/02/2009 at 16:50