I think that this is definitely a fight where someone will get KOed or TKO. Silva is a beast, there is no doubt, but he has not fought as many quality opponents as you would expect given the depth of PRIDE's old division. Part of his record was built on tearing nobodies to pieces.
Liddell looked lackluster in his last fight but will always have a good punchers chance. However Silva seems to be good at recovering quickly from heavy hits (Until his last 2 fights).
All and all it should be a good fight and I think Silva will win this one.