Nice Sound, Loudest- Sceptres, Bubs
Nice Sound, Real Loud- Epcos, Specialty Spares
Nice Sound, Loud w/throttle- Thunderbike Pipes
Some people like the sound, Not so loud- TORs
There is nothing scientific about this list. This is just what I've learned from visiting this site. The only ones I can speak for are the Specialty Spares and the Sceptres (both of which sound real nice, and are very loud).
