7S Cameron
1000+ Head-Fier
2-5/8" o-rings?
Yep.
The S500 are good enough that I traded away my AT WS55. Are the WS99 significantly better than the WS55?
They are significantly better, but if you're still not sure ask Dsnuts. He own a the S500s, ES700s, and the WS99s. I know he has at least heard the WS55s as well.