Well, the kit as advertised as +75HP or whatever. It does a decent job for working with all stock components. If you had say 5psi @ 3K RPM you would have alot more then +75HP at redline. It's a pretty big compressor just geared way way down.
I have the V3 Sci kit on my car, it's great. Be prepared to end up at about 10-12lbs of boost though(pulley kit, pump, MAF, injectors, tune). The stock kits don't hit boost until like 4K RPM and then it creeps up to 5-6 @ redline.
I have the MM Kit on Bilistein dampers. In the back I have the MM weight jacker arms that were suggested by earlier MFE. I'm really happy with it. Spend the money and do it right the first time. I wouldn't mess with those el-cheapo solutions.
What's your setup all consist of for tuning? Given your posts I would think 42lb'ers, bigger MAF, MSD(BTM?). What tuning device are you using.
I'm probably gonna go 42's, SCT or LMAF and hopefully a Kurgan tune next time he is in Chicago(sometime next year).
Currently my car is just stock...