Chickfight.com is hands-down the best.
Tribgirls is ok. It's got some pros and cons compared to chickfight. Their girls are typically quite a bit hotter, but unfortunately, it's conterbalanced strongly by the fact that the first half of the video is usually catfighting/wrestling, which is a huge damned bore for me, personally. Additionally, they don't keep track of orgasms in any way, nor announce them, so there's not really a consistent rule for declaring a winner. Plus, their payment system is an asinine token system that is A) incredibly expensive and B) leaves you with either too few tokens to use on anything or a shortage of tokens that forces you to shell out yet another 30+ bux.
California Wildcats, I haven't looked at much, because virtually all of their videos are 39$, which is a bit much for me for just one video. I've bought one, and it was incredibly disappointing. It was basically lesbian sex without the competitive edge, which you can get for free anywhere.
Catfight-Corner has a number of "sexfight" videos, but again, I'm not clear on what they see as a sexfight. I've never once seen a girl in their videos cum, unless they're ninja cumming or something. They seem to focus a lot more on boring-ass holds than actual eroticism, and they apply and break out of holds more than they actually try to make each other cum.
Ultimate Surrender is a popular one to reference, but that isn't sexfighting in the least. This is a site that could have done it right, then veered off a cliff and screwed it up. This site is just wrestling for three rounds, and then just strapon fucking for the fourth. It's also incredibly predictable. They throw in two girls - one who's got more experience, and one who's got less, and the one with more experience always, ALWAYS wins.
Chickfight.com, mate. That's your best bet by far. Arguably the only proper sexfighting site on the internet.
