Rock sweet :) Most rock uses very bright loud mouthpieces to cut through. Runyons are decent, Dukoffs are pretty good (look up david sanborn if you wanna hear his) except the quality of those mouthpieces tend to be bad, and facings a little off. Also if your embrochur(cant spell) isn't strong enough you'll squeak. Or if your willing to spend a little bit more money, I bought a Brancher "B" chamber, with Brancher Jazz reeds (I use size 21 with 3 brancher reeds) its very loud, and very bright (just like dukoff except easier to play) and it comes with a good ligature :D. I've heard B.L.s have gotten worse now days...but I've never tried them before. But just incase, I have a really good mouthpiece I use its not rockish though, its a little darker but has some edge to it, but its probably the loudest mouthpiece I know of, way louder than meyer, ottolink, vandoren, selmer, etc. Its a "Beechler Diamond Inlay" (M6S with 2.5 java reeds).