If we're really going to buy a striker, then it would be Tevez. even if he would cost more than 20m, we have already paid that amount once in each summer. one signing turned out to be great, the other didn't.
Tevez is skillful, intelligent, hardworker and he would suit our style of play. being a part of the attacking 3, and exchanging positions with Gerrard and Torres, while Riera keeps the width on the left.
we need a striker who is as skillful as Tevez. just look at Benayoun's skills and how it helped us win so many matches in this season and the season before that. he would prove his worth against the smaller teams who you need someone to terrorize their defenses and win games.
If Keane stopped falling on his face, and shooting blanks instead of touching the ball, he would've been a great signing. Tevez would be that player.