It's a tough one, I really think he could become fantastic, but he needs minutes. However we loan him out then lose somebody to injury again (Walcott, Wilshere, etc) and we could be shooting ourselves in the foot.
Regarding 'spend spend spend', the interesting thing is in most games Ozil seems to be double marked, which allows others to do something with that space. Considering even after the back to back Chelsea, Liverpool & Dortmund games... the final game of that quartet against Utd when half the XI were sick with flu and Mertersacker out - still managed to create a little and lost 0-1. I'm pretty confident going forwards, and whilst the wheels could still fall off, exactly where are we finding a top class RB/Striker from in January?
Perhaps throwing ?45m at Suarez would be a good laugh, considering Liverpool have a few injuries and a difficult month of games and are liable to fall down the table with Sturridge injured. Even throw in an extra ?1 ...
Better options seem to be Benzema, Pato on loan or Morata from Madrid, since Wenger and Ancelotti have a decent working relationship it seems. Jenkinson can "do a job", but agreed Bendtner would be a disaster if he had to play there for any length of time.