I don't think the Raiders go QB no matter where they pick. Just a little over a year ago they gave a heck of a lot to get Palmer, and he hasn't really been their problem. They are just awful on defense. I think they'll go with the DT out of Utah.
This isn't even wishful thinking. Everyone is assuming that whoever has the 1st pick wants Geno Smith and will take him, I think a team like the Raiders have so many needs, that QB is pretty far down the list, and unless there was a can't miss number one QB in the draft (most will tell you Smith isn't a sure 1st overall) Oakland will go D first.