I decided to get bolth the gt and the xxx-nt, currently I bought the xxx-nt, upgrading the suspension arms, c/f towers, pivoit blocks, kevlar spur and titanium pins and turnbuckles. Any other suggestions on hop-ups, motor, pipe or simple tips? I hear the stock motor is pretty good out of the box, other than that I could care less about the side exhaust. I'm planning on keeping the stock motor in it for track set-up and beating it around. I read that ROAR allows turbo plugs now so the engine choices go up, but which one? I want good mid-range to top end power, high RPM is not a must, just more off the line punch with managable power curve. The RC10 GT has tons of options, almost endless, but the design is kind of robust, haven't checked out mugen yet.