I think he's off to the Dippers but I'd love Van Dijk here or some player of a similar ilk.
I think too many people, on this and the Sanchez threads, are still of the old mind set of having a starting 11 and squad players.
The fact is you need around 16 players all capable of being 1st team players and then squad fillers who will add depth to the side.
The likes of Bravo, Danilo, Mangala and Delph are all squad fillers. By that I mean very good players who will cover injuries and play a good number of games. However, they are never going to be the first names on the team sheet when we have a fully fit squad.
Then we have the likes of Vinny, Gundogan, Bernardo and Jesus who are all more than good enough to hold a regular starting position in the side. These are not back-up players, they are crucial first team players who ensure that there is not a huge drop off in quality when the likes of Kun, Sterling and Silva etc are rested. They also provide the competition to the other players.
IMO, we could do with another 3 first team players and the only player from the current squad who it would deeply affect is Vinny. However, the only reason we need a CB is due to his injury problems in the first place.
Signing Sanchez, Van Dijk or another top CB and a defensive midfielder would see us through to the end of next season IMO.