well.....sometimes with speed comes sacrifice, but in this case, I'd agree with you, it will be a tad on the raspy side, but all things considered, it shouldn't be that bad, and actually if you go with a high flow cat, it probably won't be bad at all. Though I haven't had the DC cat back on my car to talk from experience. Though, one thing I can say is, dont run a Greddy Evo wtih no cat on your ITR, they sound mad raspy with no cat...

Any way, good luck what ever you decide..

later,
Aj