Part of the battle in a football game is psychological. To strike fear in our opponents just by the line-up alone and to instill confidence within the team itself to produce the best performance.
We desperately need to sign a player who would, together with gerrard and torres, strike fear into the hearts of our opponents. At the same time also not rock the boat too much with too big a change.
The best choice is Villa, providing Valencia allows him to leave, if not Silva or maybe both.
3rd choice Defour cuz the last time we signed a youngster who was such a talent they made him captain of the club, it turned out brilliantly (Torres)

An attack of Torres, Villa and Gerrard. And please note, Villa and Torres have a proven partnership and Gerrard is also proven in CM/AM. Not a fantasy mix of players like *coff* Madrid *coff* where kaka and ronaldo have never played with each other before.
Anyways, how come nobody mentioned Aguero? Does he not fit the bill? He was perfect for me in football manager LoL
