Turbo recommendations

What I don't understand with that turbo though, is what's the point of taking a t3/t4 turbo, and adding a t4 turbine to it? Seems backards to me, but I may be missing something. And other than a looser AR, the t3 is exactly the same as far as I can tell http://www.ebay.com/itm/CXRacing-GT...Parts_Accessories&hash=item43a9544582&vxp=mtr
And is there a map for either?

There is a slant that makes 250rwhp on 7psi using a gt35. Rear mounted. But it has quite a bit done to it. I'm not sure if I would trust CXRacing personally, just because I like more established companies. Have you had/heard many things about them UOP?