Well, lets compare first. Blaziken has lower speed, but it's hidden ability is speed boost. That and Swords dance make a great combo. It also learns awesome moves such as Brave Bird, Flare Blitz, and Hi Jump Kick. It has rather good special attack too, so Overheat is a good idea. Don't forget Stone Edge and Earthquake, which do alot of damage. Now for Infernape. Infernape has much better speed, and the hidden ability Iron Fist, which powers up Mach Punch, the elemental punches, and Close Combat. It is a good sub-puncher (substitute and Focus Punch) and knows Fake Out. Life Orb + Close Combat + Flare Blitz + Stone Edge/Earthquake makes a good sweeper. It can also learn Acrobatics and U-turn. Okay, comparing is over, and the Pokemon I pick is... Infernape! With great Attack and Speed, it would be a great addition to your team. I hope this helps! -Jellohamster