Which rematch would have more PPV buys?

I'd prefer to see Pac-JMM than Mayweather-Maidana.

PPV depends on other factors such as the undercard etc. I think Pac-JMM would do quite well, it'd be almost guaranteed a great fight and is 50-50, with Mexicans coming out to support JMM in what could very well be his last fight. Pac and JMM both looked good last time out but also looked slightly vunerable but both are still top 10 P4P.