i was going to buy that setup, with the cat, but a few things happened to sour me on fabspeed. i actually ordered it direct from fabspeed and they had not even started building it on the day it was supposed to ship, no one told me and they blamed it on the sales guy supposedly quitting and no one looking at any of his accounts, which i HIGHLY doubt would happen in any company their size; they originally sold it to me with the cat after telling them that 85% of my use would be at the track, and as soon as you track the cat it voids the exhaust warranty; there was a pretty bad thread on rennlist about some bad customer service. add it all up and it doesn't look good to me.
that being said some people rave about them and their products, so to each their own i guess. you won't have the worry of the cat so that is a plus.