I think $785 is quite pricey, for that price I would expect that blower to satisfy me sexually. No disrespect to TheShodan because he knows his stuff and has good customer service from what I hear. I know for $655 you can get a Garrett GT3271 journal bearing turbo capable of 250-450hp (you would have to change your downpipe flange though). That's $655 for a brand name turbo versus $785 from someone who builds turbos god knows where.
(Again no disrespect)

Is your motor built?
Are you looking for a fun daily driver or a dyno/track monster?
This kind of thread belongs in Engine Tech and Tuning.