I ride a '12 Pro, and I have a an XM in the garage that I have not ridden yet. I absolutely love the handling and performance of my Pro. The XM has a much different feel to it than the Pro does, even when I'm just standing on it while making motor noises. The fit & finish on the XM appears to be better than on the Pro, and I think the XM is going to be a great sled. I, personally would go with the Pro, and swap out the driveshaft immediately, like Jaynelson said. Once you get accustomed to the handling of the Pro, nothing else really compares. Can't really go wrong either way.