Shift

Okay here is my situation. I have a 2008 Ford Mustang GT that has Flowmaster exhausts on it from the previous owner and they sound pretty good. Not the best but not bad. I don't know the chamber or model info.

I will be getting FRPP Hot Rod cams and Corsa X pipe with keeping my cats done to my car in a few days. I was going to get Corsa extremes with them until I got my quote of 3600 bucks for it all to be done. Without the exhaust it came out much lower at 2200 which stunned me.'that much just for exhausts. SO I had them order the cams and xpipe. I have read a lot about Flows and xpipes sounding like a raspy tuner and in general awful. Question is 1). Is that true what most ppl say, and 2.) what would you recommend in terms of exhaust to go with my xpipe.

I want my car to be loud yet have a low rumble and muscle car sound hence why I'm doing cams.
The car also has a Roush supercharger and CAI. I'm trying to also do my best in masking the whine the sc makes as much as I can.

I did find that big price diff weird since the exhaust in of itself is around 700. Thoughts and help on this all would be much appreciated! Thanks.