I agree SMC is an ok sponsor as well as Tranny Surprise from ND. I love reviewing that site always a great site to check out great updates.
Here are a few others that I like for various reasons...
:pigs06:
Shemale Profit
Good Rep, Great folks to work with!
Tranny Pack is one of their sites.

Tranny Bucks
Bareback sites, a network pass and they have a good rep.

CWD Cash
ShemaleMov is one of their sites.

Grooby Bucks
One of the oldest sponsors on the planet.
Amateur and pro shemales

Don't forget ladyboys!
Island Dollars is a nice sponsor for Ladyboys
Ladyboy Pussy is one of their sites.

There are a few more, but these are the ones that were on the top of my head.