Think we will buy two more players this window if we qualify for CL. CB and CM. CB for £8m-£10m and i guess we will see who the CM will be, if we are to believe the latest from Khedira, it may be as little as £10m-£15m. If it really is Carvalho then the fee will most likely be £25m+.
Most likely we are not buying a 'forward'. There is no one left on the market. Cavani is staying, Falcao will surely go to Real for the money they are getting for Di Maria. Reus is unlikely because Bayern (or maybe even Barca) are in his ear and telling him to wait a year.
After those 3, there is a drop in quality, although i do wish we would buy a Giroud level striker for £15m to compete with him and push Sanogo down the pecking order.
So, i predict we will spend atleast £25m more (basically the CL money).