Erm, what? I dont get this, I'm sure you're normally one of the ones to slate others who say players "arent United quality" and thats essentially what you're saying. You can bet your life that were we to predominantly play a 4-5-1 then VdV would walk into this team, because you're not really gonna tell me than Anderson or even Giggs (debatable) can play in the hole better than him are you? As would Sneijder.
I suspect Robben went to Bayern, because no other top clubs were willing to gamble on his fitness, unless you're gonna tell me Hargreaves' level is West Brom right? Sniejder went to Inter and won the treble and that 'level' doesnt get much higher.
If Diarra goes to Spurs, that doesnt necessarily mean that its 'his level', maybe its because he's not the type of player the top clubs are looking for.