I also have a suprex400 se, and as previously stated, it;s a very underated heli ! it's way better than a falcon 3d,
(i have one) and a shogun. But as allready stated, part's are cheap , but not so easily obtained !
I also have the ROBO 450 se, and it's just as good if not better than the 400, very quiet, and very smooth, but I think part's are also going to be a problem. it's also known as a black hawk 400 v2, and as a predator.