You know, when I had my 01 GT with basic bolt ons, I realized how much the 2v does not really respond to mods as I thought, I wasn't happy with the results, the only thing I enjoyed was the loud exhaust I had on it, made it fun, but it was all mouth and not enough performance to back it up. I didn't want to supercharge it because I knew I wasn't gonna keep it for long since I wanted a termi.
Bottom line: if you do plan to keep your car for a long time and want some serious power increase, supercharger is the way to go.