I'm no draftnik, but at pick 11, the consensus top-5 are probably limited to two positions - OT and CB. I say this is ignoring the Bills' needs and going with the BPA mindset. Brendan Albert is listed as a guard, but from what Kiper said on the Mike and Mike show the other day, he has been worked out as an OT prospect. A case can be made for Rashard Mendenhall as BPA at #11, but it is highly unlikely that if he were the BPA the Bills would actually draft him.
In the 2nd round it's probably something like this:
1) Brain Brohm/ Joe Flacco
2) Kenny Phillips (if he's still on the board, otherwise replace with your pick of a WR prospect)
3) Pick a WR prospect
4) Pick a WR prospect
5) Pick a WR prospect
5b) Pick a WR prospect