Sunny is the way to go. I went crazy for her when I saw her on Sunny Leone Loves Matt. There's a scene when she's on a white couch, the moment when she lays on her right side, and the guy penetrates her, her pussy seems to be so TIGHT! Getting a hard on just for remembering it.
Priya seems like more of a crazy person in bed, which I like, but Sunny seems like more of a sensual kinda person, which I also like. It's honestly hard to say for me, but if offered the company of either, I wouldn't say no.