I'm about to buy a Timex HRM having looked at various models available (Polar, Cyclosport, Reebok etc). There doesn't seem to be a lot between them in terms of functions at the £75-100 mark, but I'm leaning to Timex as they make Ironman watches which I had in the past (found on a road and then lost it myself!) which was good and I just feel the stopwatch from a watch company will be more accurate. Stupid reason probably. The only question is - fabric or plastic strap? Any advice on this?