Definitely get the bike mount. It's way less awkward than trying to twist your arm up to visible range all the time.
You can get it as part of the quick-release kit. http://www.amazon.com/Garmin-Forerunner-Quick-Release-Kit/dp/B000ONDECY/ref=sr_1_6?s=gateway&ie=UTF8&qid=1285615002&sr=8-6