Dont get the JWT PP, it has a dead pedal feel. I had that set up in the SE-R and launching was a pain in the arse. I went with the ACT PP with the 01 SE disc in the G20. I love the feel, and she grabs perfectly.
I have driven the ACT XP with the 6 puck disc (my friends 91 SE-R) and that is absolutely ridiculous. Way to extreme, hence the name exterme pressure plate. The ACT HD/PP and the 01 SE disc offers the perfect balance, not to soft or to hard. The JWT PP is way to soft, even the stock PP feels firmer. I stand by the ACT HD/PP and 01 disc. I have had it for over 25k with no problems or slippage, and still grabs as good as it did 2 years ago.
ACT PP will stretch your clutch cable and may need adjustments.... interested in what you are going to do as well. Also take a look at capclutch.com my buddy with a det p11 has been running and is very happy.