btw, what would be a good street racing clutch for my 2000 GT?
The factory clutch is a really good clutch. Anything more would be overkill and shorten the life of your clutch. More is always better except when you buy a clutch. Remember that.
As for signs of a bad clutch, your clutch will engage when the pedal is almost all the way releases. With a new clutch, you let the pedal go about an inch and the clutch engages. It takes some getting used to, trust me.
Also, your RPM's will rise a lot faster without your car accelerating fast. In other words, your RPM's will climb high while you are still going like 2 MPH.
Also, if your clutch is really shitty, when at really high RPM's, your clutch may slip all together and your car will redline without you going anywhere.