I always laugh when I read these articles - always refering to Michu as being ideal to spearhead the attack when he is adamant that he wants to play in midfield. In fact that is part of why there has been such a rush to get a couple of srtikers in. Anyone who has scouted him out, assessed and contrasted his goalscroing as a midfielder and as a striker would know where he should be playing.
£22m is really a figure grasped out of thin air - then again they are pushing their luck with Suarez and may think that they can stoke things up with a stupid offer before getting the two players for something like £26-28million. Which would still be too low. In all honesty, I'm not sure about Arsenal going for Michu. He's older than they'd normally go for and only two seasons in top divisions. There are plenty of other players they should go for before.
If I was them, I'd go for Benteke - especially if their looking for a figure head. But he's a younger player with better resale.