KB's are expensive especially when you add an intercooler. If you want the best bang for your buck then Id say that you should go w/ vortech. You can get as much if not more power out of the right vortech then you can out of a KB and w/ spending alot less money. All depneds on what you want to, a Paxton or Vortech wont build boost until 2,500-3,000 RPMs but kick in alot in the higher RPM's where as a KB has instant full boost by 1,500 RPM's. Just a word of advise the #'s that KB advertises I belive are kinda high, I have 2 friends that had or do have KB's on there car ( 01 GT & 01 Cobra) and neither one of them have hit the advertised #'s on the dyno that KB has advertised.
I have no probs w/ Centri blowers, IMO they look alot more sexy under the hood then a KB unit does. I like my paxton alot, very strong well built unit and looks really nice. My kit cost me $3,342 including shipping and a polished unit ( $150 more) I dont have any accurate dyno #'s with it yet but once I get it running right in the spring then I should be seeing some pretty decent #'s