^They stopped making them about a year ago now... Before it was the clutch disc, pressure plate, flywheel setup all in one. Now they're only going to be making it as the disc and pressure plate, you supply your own flywheel. You can even just get the disc if you want and get your own pressure plate (they reccomend the ACT HD plate).
Basically no more flywheel, slightly different disc, and about $500 less ($1,300 to about $800).
The STI one is rated to 500 tq at the crank, so I would guess the WRX one will be about the same, maybe a bit less because of the smaller diameter.
Also, my clutch is definitely starting to slip. Any more than about half throttle and it lets loose. I'll probably be fine for a while since winter is setting in, but I'll definitely be doing the clutch by spring time. I should have the time to do it myself, but if now it'll be around $500 in labor to get the job done. To do it myself I just need an engine crane for a weekend because I'll probably just pull the engine to get to it.... Still not sure though, I know I can just move the trans back far enough without having to take off the front axles to get to it. I'll have to figure out which is less work.