As a point of note, there was a little 'glitch' in Garmin's website recently, and they were offering 910XT at 60% off, and managed to get one with full Tri kit for just under £160, a bargain, so keep an eye out on forums / Twitter etc, just in case
Oh, and it is an excellent bit of kit, and far better than my old 310, which had a dodgy strap, and is now soemwhere between the lake and T! when it ripped during removal of my wetsuit.