First things first, and free. Have you checked your codes yet? Second, I have never had a clutch go bad, so I wasn't 100% sure if a worn out clutch could make a car "sluggish". I have driven a car where the clutch and pressure plate were bad, whereas the rpm's would raise but the car barely accelerated. Though I wouldn't choose the word sluggish to describe that.
In my last car I used a dual friction Centerforce. It was there mid level clutch. Street/Strip. Held 110% over stock. Never had any problems with it.
In the supra I use an Exedy multiplate clutch. It doesn't seem to be as aggressive as the Centerforce, but it will hold 500+ft.lbs of torque. Though I haven't gotten there yet, so who knows. I can't remember what I payed for the Centerforce, but the Exedy was about $350.00. It was cheaper than the Centerforce iirc. Flywheel, throwout bearing, and alignment tool included. If your going that route, spend the extra money and have the flywheel lightened and the clutch balanced.