Sweetest KA-T setup in my mind is right off of ka-t.org

Ebay bottom-mount manifold
S15 or GTIR T28@9-12 psi
SR 370s or DSM 450s w/ top feed rail, Walbro
SR intake, turbo outlet, ebay SR downpipe with a flex section, any exhaust
Cheap ebay FMIC kit, generic ebay BOV or stock DSM bov
DIY Rom tune or SAFC+4-5 degrees retard at distributor
Maxima/Z maf a nice upgrade, but the stock maf will work at lower boost/power

I've seen several setups that closely match this generic formula that put out ~250hp for relatively cheap at just 9-10 psi, even more at 12 psi. Awesome torque band, instant response, and with the T28 they hold power past 6000 rpm unlike T25 cars that peter out past 5000. If I ever get a daily driver and decide to have some fun with my car this is the way I'm going. If you want more power than this, get an LS1. (Well, I'd rather put an LS1 in an FD, but that's a whole new thread topic.)