TopBucks and ARS are my two best sponsors.
They both pay on time.
ARS has weekly payouts - which was good when I was in need of some cash flow.
TopBucks lets you chose from one of up to five different tours - so iTeens doesn't look the same. I have personally seen this make a good deal of difference.
Both have a decent amount of FPAs.
Both have good support.
Favorite TopBucks Sites:
allgangbang
iteens
ultravideos
girlsgetcrazy
trannyhouse(no not for me silly)
gaydome
Favorite ARS Sites:
India Exposed
Voyeur Dorm
CuteGirlfriend/AllPetite
Both have good stats (now that TopBucks is showing the sales referrer).
However, Allison is better looking than Toolz
You can't go wrong with either one in my opinion.