I think I'm going to go the same way, with the turbo over the supercharger. I've had quite a few SC cars, but never a turbo. I was talking to David from STS, he said they had an 05 which dynoed 517 rwhp and 517 ft/lb of torque on only 7 pounds. They had another on 12 pounds which made 714 rwhp. That's wild.
I just wish I could find someone around here who had one, I'd like to FEEL the lag, or lack thereof. I know turbos have come a long way since the lag-monsters of the 70s/80s, but it's still something I'd like to experience before I go and dump $7k.
I'm really interested to hear your impressions after you get yours installed, so please post back if you have time.
Good Luck!