Melo is far superior choice to Dago from every view.
He has more potential, he is young enough to adapt into a new role.
He is even more proven to the highest levels.
He is better skilled both offensively and defensively.
He is more of a complete player that can be used in both variations of 4-3-1-2 (with deep playmaker or DM in front of the defense) and in 4-2-3-1
BUT, he is a Fiorentina player;
Fiorentina are a theoretically direct competitor and the last thing they would do, is upgrading us with one of their best assets.
He will cost an arm and a leg, being nmuch better and more promising than Dago, is worthy of more money. But its Secco and Fiorentina we are speaking here. Each and every deal Secco made with Fiorentina ended up bad for us...
This chances for this to happen are IMO minimal. But if Secco pulls that off, for a decent price, i will be so impressed that i will start respecting him!!!