NyQuiL

I was set on getting the t3/to4e 60 trim with .63ar, but i recently started reading some threads about the precision turbos and people switching over to them. What are the obvious benefits? (spool time, hp gains)? And wich of the precision series would be close to the turbo i was plannin on purchasing.
Hp goal was 450 - 500 at the max. car will mainly be run at a lower boost setting for daily driving ability.