I would go for:
Hart
Zabaleta Kompany Mangala Kolarov
Dinho Yaya
Navas Silva Milner
Aguero
Willy, Demichelis, Clichy, Fernando/Lampard, Nasri, Sinclair, Dzeko
Arsenal away is one of the games we struggle with most, and is one of the few games where we don't have the majority of possession. For this reason, hitting them on the counter could be key. Navas' and Aguero's pace will be key to that. I feel an extra body in midfield could help combat their midfield 5 (which overran our 2 at Wembley), hence Silva behind Aguero. There's plenty of width with Zabba, Kolarov and Navas, opening up the pitch for the likes of Yaya and Silva to create in the middle. And with Kolarov at left back up against Sanchez, Milner comes in on that side for extra support. I also feel that Mangala should start, as:
(a) he needs to start sometime, and better to get him going before Bayern and Chelsea.
(b) He can help combat the pace in their front line (Welbeck, Sanchez, Chamberlain) with his superior athleticism.
(c) His ability in the air could help from offensive (and defensive) set-pieces
I doubt that's what Manuel will do though, If I were to guess how we will line up:
Hart
Zabaleta Kompany Demichelis Clichy
Nando (If fit) Yaya
Nasri Aguero Silva
Dzeko