A lot of people like MACs. Personally, I have flowmasters, which some people don't like for various reasons. (too loud, too much interior resonance, don't like the "gurgle", etc.) I love mine though. I've gotten numerous comments from v8 guys saying how good my car sounds. Of course performance-wise they still tear me a new one, but hey, it's a start. Search the archives for mufflers and stuff. If I recall correctly, not too long ago there was a thread about this and someone posted a link to a page that had a whole bunch of sound files for different exhaust setups. Anyone remember it?