actually i think marquez might win this fight. if we're judging khan in the barrera fight, that's good and dandy but remember, barrera was really washed up while marquez, while not in his prime is far from being finished. besides, i think marquez' superior defense would make it harder for khan to look as good as he did against barrera. another thing, marquez definitely had more power than barrera and i think with khan's china chin, he could very well catch him and KO him. even barrera tagged khan a few times and "moved" him a bit. i think marquez, while being the older fighter would definitely be a very dangerous opponent for the youngster. in boxing, the puncher always has the harder task of ko'ing his opponent but in this case, i think marquez can definitely do it because he's still a very dangerous fighter for anyone 140 and below!