well, imho i think maybe Fedor has the strongest punches right now...His explosion give him LOTS of power...He doesnt have the BEST boxing skills from a technical point of view (like Mirko for instance, or even Hunt i think). Many times he 'throws' his punches, giving up a little his guard, and when he is punching hard (wich is always, LOL) he doesnt seem to use lots of combinations with hooks, or other things (like Mirko or Hunt do for instance)
is just my opinion...im not saying im right. But SEEYING Fedor punching someone makes you feel the pain just to watch, LOL
But either way, my favorite striker is Belfort, Power AND lightining(sp) SPEED!