DuMaurier 7

I'm almost ready to order my new big single , for those who dont know I run a semi peripheral ported 13B REW with a Pro jay intake etc , I plan to run 25 - 30 psi boos max.

I've posted asking what turbo I should get a few times but havn't gotten the response I hoped for , so Im asking one more time .

The choice is between a GT4508R , GT4708R or the GT4718R , I am leaning to either of these because of the huge turbine wheels they use , I know this would be ideal for my p port . I know the 13B will spoll a bb GT45R without any problems, 'cause I'v seen it happen , but I'm wondering about the GT47 , would this one be too much of a good thing ?

Please let me know what you guys think and please lets try to keep this one as factual as possible , I can get all three of them at the same price so I naturally want to make sure I'll be getting the most I can for my money, thanks in advance guys.