louder or better

I need a mid pipe with my new set up I was wondering what will be better I have an e303 cam, GT40x heads and borla exhuast and shorties. At first I wanted an h-pipe with cats because I heard they were louder then x pipes with cats, but then I thought that the x pipe might sound better and smother and more deep. The borla's with stock h pipe and stock cam is pretty quite below 2000rpm but sounds good at wot. Any opinions on brands and h vs x (with cats)?

Are those the new Xb (or something like that) pipes that are aluminum and alot cheaper. Becuase I've had my eye on Bassani I heard they are the best but the stainless steel is expensive, is there any performance difference between the regular pipes and the more affordable ones.