Yes, the actor who plays Sylar is the new Spock. He's excellent on heroes. Incredibly evil but still at the same time you don't want him to go away. He has an unusual presence. I look forward to seeing his portrayal of Spock.
Karl Urban is from LoTR. He's also had important roles in Bourne Supremacy, Pathfinder, Comanche Moon and THe CHronicles of Riddick. I can't see him as McCoy but I ain't complaining either. Luv him!
An excellent Eric Bana movie to see if you haven't seen it yet is Munich which also stars Daniel Craig (007), Ciaran Hinds (ROME) and Geoffrey Rush(Pirates of the Caribbean)