I'm not sure we need another striker. Benteke is, and should be, our first choice. What we lack is a decent creative player(s) to replace either Gabby or Weimann. Add one of them and Weimann would be our first sub (ignoring Kovak). I actually think Weimann deserves a chance as a striker (rather than a winger) before we start spending Xm on a player that won't play.
Put another way, we have bigger priorities than buying a guy to sit on the bench.