There can be a bit of fence sitting and covering all bases in the "he's a good player, but..." argument, but if you genuinely do think he'd be a good transfer regardless of other factors, then that's fair enough.
I agree that he's proven to be a good player for Aston Villa, but I question whether that is enough for us. The concern I have about "good for the team" type players is that if you're still lacking a couple of top class players to bring out of the best of the rest, the team just isn't going to be good enough. Not for our aspirations.
If our line-up next season is, for example, Reina, Johnson, Carra, Cahill, Enrique, Lucas, Adam, Gerrard, Downing, Suarez, Carroll - I think top four will be a struggle again. And we'll have spent a good 50-60M on that lot.
If we do as City or Chelsea have done in recent years and buy as many decent players as we can to be part of the squad, it's going to give us good strength in depth potentially. I don't see us doing that though.