I had a CEN Colossus a few years ago. Overall, it was good, but I couldn't get properly hardened outdrive cups. They were just wearing out after about 5 runs. Then, contact CEN and wait several months for more. For someone like you who doesn't mind building/rebuilding, I guess it's no biggie. For me, X-Maxx was the better call. (even the first one with the ESC that wasn't up to the task)
I DO like the basic styling and the good size. It's unmistakably big, but not overly so. (as X-Maxx is)