Birdshit/Berdych because there are a lot of veterans in there. Kohlschreiber in the 2nd round. Harrison or Gasquet. Tipsarevic, Davydenko, and Verdasco are no walkovers either.
Berdych definitely has the hardest. Second hardest I would go with is Soderling. Starace, Istomin, Gulbis, Kukushkin, Seppi, Clement, and Tsonga are not easy if they are on. I believe I posted a difficulty post on a different thread, I'll probably copy/paste it here later tonight when I have time.
Most of the brackets in this tournament are VERY FAIR or at least EASY for the top 8. With the exception of Berdych and Soderling to a lesser extent.
Regardless of situations, I expect Murray to defeat Federer in the final in 4 sets.