I've only read the first few pages of this when I should be doing other stuff, but for a marque 'show-stopper' signing, someone who has won 'World Footballer of the Year' would be necessary; and there's no need for any discussion or opinion on any other players.
This would leave us with two names, one of whom I feel ill about and can hardly control my keyboard to type the girl's name:-
Ronaldo
and
Kaka
Some people would be miffed for obvious reasons if either of these two were on our list - although I'd be wondering about Manciti's input and on whom he feels we need most if as charged we're going (as remarkable as it sounds) for the title this year.... and I don't doubt that we are.
hmmm
(and Messi isn't leaving Barca before anyone pipes in, and Fabregas - although a very good signing, without question isn't likely going anywhere except to join up with Messi et al as well, and Cesc as good and as young as he is probably isn't 'a show-stopper' yet. Ibra might be a calibre signing, but is he even a show-stopper for reasons already mentioned?)
it's fun to play these silly games isn't it?