I think lightning just struck-- I agree with MS 100%
Silva can KO anybody. But unless he KO's GSP, I think GSP wins by decision.
GSP has a much more impressive resume IMO and has fought much better competition. Two wins over BJ, Hughes, Alves and pretty much every other decent fighter in the division. Silva beat Dan Henderson and destroyed a clearly overmatched Rich Franklin a few times. Other than that his only real impressive win was a demolishment of Forrest Griffin at 205, which is hardly an impossible task.
Also, there is nobody at 185lbs that I want to see Anderson fight and there is nobody at 170 I want to see GSP fight.