I test paddled the Swift Cruiser 14.8 and 15.8 recently. I'm 5'9" and around 175 lbs, and the 14.8 fit me very well. The 15.8 fit too, but I felt the wind pushing me around in the 15.8, and I was more one with the boat in the 14.8.
Both canoes were nice, and paddled well, but I wasn't wowed...