In regards to the FiTech unit:

-What pressure is their integrated regulator operating at? And is that pressure fixed?
- Can it do PWM or control pump speed? I don't think I've read much, if anything about that.
-Last question and I know this is subjective but, are you satisfied with the fit and finish/quality of the product? Not in light of it costing half as much, but as an aftermarket item you're putting on top of your engine.

I'm in the throws of building a budget SBF (gasp!) so this is an appealing option.