R3 - TE Jermichael Finley, Texas
R4 - DT Dre Moore, Maryland
R4 - DE Darrell Robertson, Georgia Tech
R5 - WR Keenan Burton, Kentucky
It looks to me like there are only two really solid TE prospects left at this point, so that's where I'd go in R3. Kellen Davis is the other one and I think it would be a toss-up as to which one the Bills draft. DE is also starting to get very thin, so they may look there as well in R3. Edit: I forgot about Rucker. I think he certainly factors into this as well.
Dre Moore probably shouldn't be available at 114, but looking at this draft so far, it appears that the DTs are slipping down a bit and a good one might be stolen at this point in the draft. If a good one is available, it would be to their benefit to pick him.
Robertson is an excellent pass rushing specialist who was injured training for the combine and hasn't been able to workout for scouts, but should make a complete recovery. He could be a major steal at this point.
Finally, we have another WR. I still can't decide if they'll look for another redzone type, or an all-around player who can push Reed and Parrish for the slot role and potentially replace Evans if necessary. In any event, I do think its likely that they'll take another WR in R4-6, plus possibly one more with a 7th.