sc'd 99's come in here

I am ready to put down $4600 for a kenne bell 1700 for my 99 cobra pushing 6.5 psi with the 90 mm MAF and cold air kit it comes with. They claim I will put down 426 rwhp. How much boost are you running on the stock block? Any info for me would be highly beneficial. How loud is the 1700? I can't find any sound clips anywhere and the kb website says it is whisper quiet but I am convinced I'm gonna hear that typical screw type whine. Thanks guys

I'm lured by the fact that the kb will produce 426 rwhp at only 6 psi and achieve max boost by 2000 rpm (have you seen the dyno sheets on these? amazing) I find the stock bottom end to be too fragile for a supercharger with a small (8-10) amount of boost and my right foot. So the kenne bell seems the best candidate and I have 5 g's to drop so what the h e l l you know. Plus If I read right the thing is upgradeable. try getting 426 rwhp from 6 psi on a centrifugal with the type of tune that the kb has (very comfortable) it probably won't happen.....prove me wrong though. I was going to go with the ati procharger at first but shy'd away after hearing about the kb 1700