I bought a Polar RS300X a couple of weeks ago to replace my old F11 which was getting a bit tired. I bought it at Rebel Sport for $237.50 (5% MBF discount), and I'm very happy
Data recording and recall is great, as is the weekly fitness test. They've also moved the start button from the side to the top of the watch, which means you're not going to accidentally start a training session from bumping the start button with the top of your hand. There is nothing more annoying than looking to see what the time is, and finding your watch has been recording nothing for an hour and a half...
You can also get a GPS attachment for your shoe if you want, but it's an additional option. I haven't bothered yet, but might in the future
Be careful buying through eBay though, because you probably won't get a warranty