Difficult to answer really, I'm not sure his parent club have put a fee on him, have they? It's been widely speculated he'd cost around £15m, however, I think somewhere in the region of £10-11m might be sufficient.
So based on that, I'd say Huddersfield; Stoke; Fulham (with the money recouped from the sale of some of their leading players leaving); possibly Leeds and.. [cough] US!
Of course, we COULD afford him, however, I think our major transfer expenditure will be on a striker, our new midfielders would come in at around £5-6m each with possible loans, so I don't see us paying out that kind of money on a midfielder.