I have a Velox Assassin and my feelings about it are similar to Jagter's: I am fine on it in flatwater but moving water would be challenging. I had a Vajda Infusion K1 prior to this and find the Assassin slightly more stable and slightly slower. I'd put it somewhere between the Vajda Msonic and Infusion in regards to stability. It has plenty of volume for a larger paddler, so I'm guessing it would fit you just fine, but I'm not sure about hip space (better than any of the other K1s I've tried though). I like it more than the Infusion, but I think that's b/c I'm a surfski paddler, so the extra volume, rocker, and pedals have a familiar feel to them. Still, it's significantly less stable overall than my Uno Max, and if I were going to do much actual downriver racing with any rapids or fast moving water in a K1 I'd probably end up trying a Jacana.