I have been installing RST and RXT clutches for the past few years. Everyone gives them a thumbs up.
I used to have a Ram910 single disc and it was brutal. Did hold constant thrashing for 20K miles.
Truly the RST could be lighter than stock pedal pressure. It also has a very non grabby engagement. The RXT isn't much stiffer and/or worse to drive.
If you plan to launch the car hard on slicks at the drag strip get the RXT. It takes abuse much better.
If you want it to rev fast get an aluminum flywheel. If you don't like the fact that you need to give it a little gas to get going then go steel. The aluminum flywheel is really just a matter of getting used to IMO.
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Project: 1969 Chevelle, alum 5.3, GTS76 turbo, Chiseled Perf A/W intercooler, Holley Dominator EFI, Davis TC, JRi coilovers, 14" brakes, T56 Magnum. CTS-V Recaro seats!
Coffey Fabrication Nashville, TN doing the fabwork! 800rwhp+/25mpg+/9's@150mph goal 
https://lateral-g.net/forums/showthread.php4?t=52976
1993 Mazda FD RX-7, built LS7, T56 Magnum, Holley HP, Davis Tech TC, 8.8" 3.73 Cobra IRS diff, DSS axles, Ohlins coilovers, big brakes.
CCW 18x11 front 315/30/18's and 18x12.5 rear on 335/30/18 RA1's, 2850lbs
10.31@137mph 165mph Shift-Sector 1/2 mile speed
441ci AllPro headed motor and 200lb weigh reduction in the works....
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