Infernape, by far. I don't like either Blaziken or Emboar (I hate Blaziken the most though). I think both have stupid looking designs and aren't as useful in the games. I also find Infernape to be far more awesome in the anime and Battle Revolution than Blaziken. And of course, I love Infernape's design. ^^
Also, me being such a huge fan of Infernape is saying something. I'm generally no monkey fan.