I'm with rmedoc. You just have to pick the people that you listen too. In different forums, its pretty obvious who is giving good information, and trying to help, and who is here to bash everyone else, every online forum is like that.
I was previously ( as in two weeks ago ) and Honda Accord owner, and was on assorted boards and it was the same.
As for your question, I had a place called Mufflertech here in Vancouver make a custom cat back for my old Toyota 4-runner, and the Accord. They put a Flowmaster on the 4 cyl Toyota, and it sounds a little hollow, I think its made to pass way more CFM. Flowmaster does have another series, 80 I think, that is geared to import engines. On their website, they have some soundbites of it on an Integra.
With the Accord I went with DC Sports muffler and resonator, and it was very low, but way too loud. It resonated bad at cruising speeds, and on long trips, even my stereo had trouble washing it out. There is someone on this board, I think in the Performance section, that has pistons/cams in HER car, and she has a Magnaflow muffler, and some video/sound clips of it on the dyno, and it sound quite nice.
My 2 Cents.
Ryan