It depends on what you want. I've come to really like Belladonna's movies, although they're a bit heavy on the anal action to me, they always feature stars I like and Belladonna's dirty talk is hot. She has a series called Fucking Girls, and another movie called Girl Train, that are all good (from what I've seen). But only for those who can stomach nastier porn.
On the flipside, there's always AbbyWinters. For me, it's mostly too soft. But it's definitely more real than most other porn. My favorite star on AbbyWinters is Patience. Ugh, she's so sexy.
Other good scenes I like:
Kylie Ireland & Roxy Deville scene from Bitch and Moan 2
Bree Olson & Sasha Grey from Bree & Sasha
Joanna Angel & Roxy Deville from Girlvana 4
Justine Joli & Jules Jordan from House of Jordan 2
Dana Dearmond & Roxy Deville from Women Seeking Women 41
Celeste Star & Georgia Jones from Pussy Cats 3
A good place to look up movies (and see screenshots if you're willing to register) is Adult DVD Empire. You can also look up stars and see which titles they were in. Good luck!