The key is; Who will best compliment Messi and fit into the Barca system?
Aguero : Not clinical enough. Has too many games where he doesn't make an impact.
Cavani : Haven't seen enough of him, apart from he scored a stunning bicycle-kick aganst us. But apparantly De Laurentiis is quoting silly money for him anyway.
Suarez : I rate his ball skills but shot conversion is not good enough. However, he is scum and doesn't deserve to play for Barca.
Lewandowski : Excellent finisher. Scores all-types of goals. Has the predatorial instinct in the box that he badly need. I like him a lot. Apparantly Man Utd are interested so we will need to act soon, if he is target.
Falcao : He is an out-and-out CF, so I don't know where he would fit in.
Neymar : Not sure he is mature enough to make the move this summer. Preferably next year, after 2014 World Cup. But he is exactly what we need; Pace, Dribbling, Trickery and Goals.
For summer 2013 I'd go for Robert Lewandowski. He could provide the Plan B.
p.s. Can't understand all the love for Aguero. I have watched Man City a fair bit since he signed there and he really isn't that good. Most games he plays he is only AVERAGE (5-6/10). I don't have a vendetta against him, this is just my honest opinion.