Should be VERY interesting to see your dynos. Please post a street tune at base (15) agressive (17) then plus water (19-20) then plus race gas(24), and whatever else (N2O) you want to throw at it. Anyway way you slice it if those turbos don't have a ton of lag, have a good powerband, and decent potential top end(mid - high 400's @ 17psi) I would be hard pressed not to call them a killer deal at the price. But, it remains to be seen if they are a best turbo in their class for any price.
I'm looking forward to studing your dynos with a critical and open mind. Your car seems to be coming along really well - congratulations!