For all those who asked, here are my observations with Roe HF cats with the stock catback:
In general, the car definitely has more bark and has a slightly deeper tone. Start the beast and she definitely sounds MUCH more alive. You can't help but to smile.
The volume is definitely louder when accelerating when compared to the stock system. However, its not an ear ****** at all and the sound is just simply awesome...what radio?
Cruising is slightly louder than stock but not annoying at all with no drone whatsoever.
I actually thought the stock exhaust sounded fairly decent and was hesitant to make any changes. I didn't want an ear beating but wanted something that sounded more agressive without going overboard. IMO, this is the ticket. Increased horsepower, better sound, cooler interior temps, around $1,200 installed. A great bang for the buck IMO.