Get high flow cats and keep the OE catback and NPP. You'll get an improved but still mellow V8 rumble <3000 and the hooligan special when you step on it. Best of both. I got 50 rwhp with: CAI, ARH w/HFCs, VMax PTB, and Mike Norris dynotune. And the improved throttle response may be more impressive than the power.
BTW, when I was in your position and researching this (having never done it before), i was very concerned about getting too loud as I have a convertible. Ted recommended this setup and he was spot on.
Trust in Ted.
If I was anywhere near CT, I know where I'd go.