If he signs then I think he'll play alot of games for Arsenal. I cant see a 20 plus goal a season man being ousted by 13 goal Giroud or 5 goal Walcott, but then again Wenger has made much stranger decisions lately.
I agree with you though, the best move fro him is probably to stay at Leicester but he seems a hungry player . He' proved he can match the best strikers in th Premiership , he's proved he can play at the highest level but can he be the top man at a club like Arsenal. It would be quite challenge for hm if he goes for it.