Aguero - Signing of the century? In my opinion, what judges a good signing depends on what you spend for a player and how well he performs. Throwing money at somebody and assuming that they will play well is a ridiculous base to judge on a great signing. Of course, he's an outstanding player, however he's come from a league where the football played is lower tempo and much more technically skilled based, whereas the Premier League is very physical and demanding. It's those players that can thrive in both of those areas that do the best in the Premier League, as we've seen from Ronaldo and a few others. I will be exciting to see how he fares though.
Sorry that was a little off-topic

Back to transfers - Sneijder would be an excellent signing for United, providing he does actually go there and not to Manchester City where he probably won't fit into their style of play.
I've never actually heard of Pantimillion, I think he's a bit of an unknown to English football fans but if City deem him good enough to be a 2nd choice Premier League keeper then good for him.
I'm happy with Derby's signings so far

Still waiting for that promised Premier League class big name signing though.