Id have them both, however I dont think either would come to us certainly not Chamberlain.
Walcott isnt great, on a lot of money had problems with injuries and never developed into more than he is. However he is someone who at us he would get 10 goals a season in an average season playing all the time. If he gets another goal this season that will be the second time at Arsenal he has got 20+ goals which isnt easy for a wide player who isnt an elite level player.
They'd both improve our team and are more than capable of helping teams challenge for the top as thats where theyve been their whole PL careers. But as I said I dont think either will come to us and the talk is Chamberlain has turned down the Arsenal deal, only has 12 months left and is off to Liverpool for 25m.