The problem is that a lot of those are not realistic - we can't afford Benteke at 25m+, Martinez and Gomez are waaay out of our range (as is my dream striker, Jovetic), Leandro may as well just fudge off now, Soldado is going nowhere even if we were willing to pay the 20m for him, and Dzeko's wages will be too high. Villa is a nice short-term solution but that's what he is - short-term and expensive, when all our strikers are aging; he doesn't solve the problem so much as delay it.
Bony is a little too reliant on power and not enough on brains and technique for me (which is why he keeps getting linked to Stoke/West Ham level), but at least his price is reasonable. I would've said that even with his temper issues Iago Aspas is decent at his age and price (and seriously, we need more Spanish imports), but he is off to Liverpool now. Will fit in well there, I think
I can see two options for us that we can afford: either an EL-level player the big guns don't want or a relatively unproven youngster with a hopefully high ceiling. In the former category Osvaldo is okay, but I'd love to see something more imaginative like Freiburg's Kruse (creative, good passer, 25 years old). I'd pay very good money for Insigne, but Napoli aren't about to sell him. I'd also be happy with Morata, but Madrid are going to be dingdongs atm. We've also been linked to Andreas Cornelius, Ante Rebic, and Vydra, all of whom are not ready but would be smarter to get in early before they move out of our price range.
Because it's so damn hard to get a suitable center forward, I would actually accept spending that money on a top-class playmaker and a creative CM who excel at one-touch passing and movement, because I think Ade would look so much better if he were surrounded by players that could actually play a quick, incisive pass and MOVE. For example, Bernard and Illarramendi would improve our creativity in the final third and intelligence on the ball immeasurably; though the latter is a creative DM (and probably ungettable), just look at how important Carrick was to United's attack last season. There's no silver bullet here - if we don't improve our movement and playmaking ability as a team, I can't see any forward who could help us much.