I did the IMS, RMS and Clutch replacement while taking the transmission out for rebuild out in the Spring of 2010, my thoughts: Definitely do the entire Sachs Clutch kit, $335 shipped from ebay, I would personally do the IMS retrofit from LN Engineering while it is literally right in front of you (you'll likely recoup this money on resale, I did), the RMS is another animal, I did mine but not sure If I would of done it again. The one in my car was replaced ~9k miles prior and was not leaking, I replaced it while there but not sure I would do that again, JMO. Test your flywheel for deflection, if within spec clean nit up with a palm sander and put it back in. Good luck......Mark.
My Write-Up:
IMS, RMS, Tranny R & R Tips - RennTech.org Forums