After I replaced my flywheel with a 8lb replacement and stock clutch some members were discussing that the 95 M3 aftermarket flywheels would fit. With that you could use the bigger M3 stock clutch that is worth a heck of a lot more power and doesn't cost as much.
Some of the benefits discussed is that you get a sprung clutch instead of the solid one that comes stock on our cars. To conteract the higher force required to operate the clutch a larger slave cylinder could be used.
Search a little bit and I'm sure you'll be able to find more info on it!