Mmmm...the jury is still out about Drogba. I think Mourinho paid in the region of 25 million for him - he progressed well during the season but he's not worth that. Toure is an excellent defender and another great example of Wenger's eye for talented youngsters - Fabregas, Reyes, Van Persie etc
Wenger also purchased another talented youngster - 17 year old Theo Walcott. He hasn't even played one Premiership game but has been selected for the England squad - Sven hasn't even seen him play!!