I'd have thought Torres - in good form at the moment although Brum typically don't give much away at home (11 goals in 16 matches).
MU are even more frugal only conceeding 9 goals at home, plus they've got their first choice centrehalves available for once so as good as he is you wouldn't expect Drogba to get a hatful at OT.
Mmmm now I think about it maybe Tevez is a good option, Burnley only look OK at home because their away form is so atrocious. Plus they've let things slip of late, in the last four home games against the might of Portsmouth, Wolves, Stoke and Blackburn they've earned a grand total of one point. They haven't kept a single clean sheet in the last TEN home games either...