If you want quality, go for a Bassani or....
VRS. I just picked up a catted VRS exhaust. Stainless steel Dr. Gas/NASCAR design. 2-piece design makes installation a little more difficult, but able to be 'fine tuned' for max clearance. Also, the ball joint exits are large, quality controled. Not like BBK, Mac, etc. The price can't be beat either. Got my SS catted X for $379 shipped. Off-road version is less than the Mac Prochamber, but probably more than the BBK.
One more thing:
H's & X's work about the same to 3000rpm at which point the benifits of the X start to show. The design of the Crossover in the H doesn't allow the gasses to flow between the tubes a well as the X design, this becomes more apparent at high RPM's were exhaust flow is substantial. Simply a better technology. Another reason why X's are quieter, there's less resonance/restriction.