Exhaust notes are truly personal opinions, you have to remember its whatever sounds good to you. I personally have a bassani catted X with flows on my 98 cobra and I love it, but then Im from the musclecar school of sound and I love flows. As to the "chambered only sound good with an H pipe and straight through only sound good with an X pipe" , I think that mainly applies to the straight through mufflers with no cats, they seem to like the x pipes and sound best with them. I have a dr. gas. x pipe on my 65 with flows and it sounds awesome. I had magnaflows on my cobra and didnt care for them much, so it really is to each his own. just my 2 cents