Its not the cat in the stock DP that is restrective, its the CRAPPY desing by subaru. Its VERY restrictive. And if you read Cobbs map notes for stage 2 all it requires is a DP.
Guicci, sounds like a plan. At one time I thought about the TurboXS system also, but decided Im going to go back to close to stock look so its out of the question for me. Make sure that you pass your states emmisions test(s) with a catless system before you buy one. As far as Cobb goes, if you have the money and want the extra features it comes with I say go for it. I have one and really like it.
"2007 WRX- PPG'd, 20G- Tim Bailey tuned
Stage 2 2005 WRX