I don't really promote any tranny stuff atm, so I dunno what constitutes a good tranny site, but here are a few sites:
Nastydollars - TrannySurprise
FetishHits - Shemale Sex Zone, Transsexuals Porno, Shemale Thrills
Hundies - Tranny Ranch
Flashcash - Simply Tranny
CashOnClick - Vaniity
Sunny Dollars - Ethnic Shemales, Soft Tranny, TrannyIsland, TrannyMafia
PimpRoll - Shemale Angel, Tranny Centerfolds