Douglas Costa is seriously your man. His long shots stat is 19 and good dribbler plus he has pace and he can play on either foot comfortably. And he doesn't cost more than 12 million.
 
Goran Pandev, not sure of his price though, but he has good finishing, off the ball and composure which will help him tuck in quite a few goals.
 
I'm surprised nobody mention Ibrahim Afellay. He got 23 assists and few goals in 2nd season. You can get him for only 7m in 1st season but if you wait till January he's availablae for free;)
 
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