Cluth Seletion For 97 WS6 Firebird

I am trying to figure out what type of replacement clutch to put into my 97 WS6. I've been told anything beyond the stock clutch and pressure plate will cause problems with the slave cylinder. Basically the slave cylinder is a plastic POS and will soon start leaking with an upgraded pressure plate.

I'm building up the car to be a streetable 400+ hp car, starting with the drivetrain first.

Any thoughts on a complete clutch package, new slave cylinder, who to get it from, etc?

Thanks