Ideally we can see Giovinco return as a quality player (with great statistics) who has started close to 30 matches for Parma this season. It's also a bonus that he's right footed, so he can add unpredictability to the team. I like that a forward guy will cut.
So if not him, then Eden Hazard/Neymar are my favourites.
Guys like Cazorla, Mata, Jovetić, Menez and even Honda (he looks quite versatile in attacking positions) are interesting.