2007 MCS 20k miles.
Just doing the wheel/suspension setup now, but planning on the following:
*FMIC
*Cat-back
*downpipe(later)
*AP tuner
*CAI
Most of it is on order already so I am wondering at what level the clutch will start to become pissy with the situation and what are some good recommendations?

 

You'll be fine at those power levels.

However keep in mind that there are lots of clutch/flywheel problems on stock power level cars.

As far as aftermarket clutches, I think the only one available is the OS Giken...but everyone seems to ***** about it, that its too hard to drive and that it chatters. Blah blah blah blah

 

The issue is that track clutches such as OS Guken, can handle more power but like thumper said, they are not particularly street friendly especially if you get the ones with a lightweight flywheel.

I do feel that the stock clutch may be ok for your application as well. Learn to heel toe as it helps preserve the clutch.

If you really must put on a better clutch, try minimania.com. They seem to have a lot of different setups for stage 1: street to stage 5: big HP track clutches. Not sure how good they are.

 

Stock clutch is fine for any power you can currently get. Don't do stupid stuff and it'll last a long time