Looking to buy anew heli in a month or two so started doing some homework and it seems the two on the plate are the belt cp and the t rex. What i am wondering is in short terms can someone tell me what the real differences between the various rex's is/ hdx,se, as, etc. Appreciate the help. I really want like the 450 range of heli's , it's just there are so many models on the rex i can't really figure what one i want in the rex if that is the choice. Thanks all.