First things first. Stop suggesting foreign players. We're not going to be bringing in any players from foreign leagues, Hughes needs a top 6 finish at least and is only going to bring in players that are premiership experienced and can hit the ground running, needing little or no time to gel as a unit.
He's also going to want to bring in players better then what we already have, with top 6 experience from the teams we're directly competing with for the European places.
That leaves us with basically:
Vidic
Ferdinand
Carvalho
Terry
Skrtel
Agger
Lescott
Jagielka
Toure
Gallas
Upson
Vidic and Ferdinand wouldn't come. Agger just signed a 4 year deal. Jagielka isn't that much better then what we've got and is hurt. Carvalho is getting very old and we're in for Terry. Gallas is a troublemaker, not a Hughes type player. Upson isn't that much better then what we've got, he's probably a last resort.
Who does that leave us with?
Basically leaves us with the 3 guys we're reportedly going for. It's not rocket science. You can talk up Bruno Alves (who by the way looks extremely average the few times I've seen him) and other guys outside the PL, who I'm sure are quality players, but they're all too much of a gamble for Hughes to take right now.