Marchisio is probably the most talented one of them, but at 29 and only playing in Serie A so far ... doesnt really strike me as a safe bet.
Krychnowiak is bit of a wildcard - just made the step up from Ligue 1, can he do another one in 6 months?
Kramer is undoubtedly the next big thing in German midfield, but he would not solve anything immediately for us, exciting talent though.
Wanyama/Schneiderlin are probably the ones who want to move the most, but Southampton is looking for another hefty payday for them and i doubt Wenger would ever consider paying those prices.
Khedira will most likely move on Bosman in the summer.
So that leaves us with Cabaye who's reportedly unhappy at PSG, knows the league and we have history of interest in him
Or Lars Bender