Both, actually. Aguero would be awesome here, but I would not be willing to spend €45M solely on him as it is rumored around, as that would backfire at us sooner rather than later. The problem with this team was never scoring goals, but conceding. And in Serie A, the best teams in the league, always had the best defense; Milan this year conceded 24 goals, Inter conceded 34 in the previous, etc.
So yeah, I'd be willing to leave a forward line up of Quag, Matri, Del Piero and Toni for next season if it would mean we'll get some solid defenders instead.