I own a CR250 and I do think it's a great boat, but I'm not an expert paddler by any stretch. I have yet to get my playboating skill where I can do anything but stay upright and up-river.
As for river running, I thought the CR250 did a good job, but I did come to the realization that I need to drop 20 pounds to get it to be an ideal river runner. I'm 6'3" and 240 at season's end.
I think the boat braces incredibly well - my brace came a long, long, LONG way after getting used to the CR250. I think the only reason it squirted so much on me was my back-end weight, but I did pretty well in for a second season guy.
Next year I plan to move up to Class IV, and when I do, I do plan to have an actual river runner. But for runs I know well and for the Pueblo Playpark, I'm quite happy with the CR250.