I think that is the problem when we play a back four. Personally, don't think there is a really good alternative to Smith. Think Dijksteel is good in a three at the back, which we don't generally play, and not sure he is good enough to play RB in a four. Would maybe try McNair there at a push, but ideally we'd have a new player (next season). I quite like that Ben Johnson at West Ham (wishful thinking even if we got promoted).