Taking into further account the total lack of strength in depth Arsenal have up front at present, Diego Costa would be another smart signing. Arsenal look lightweight in the final third at times while Giroud has had to carry much of the attacking burden off his own back given recent injuries. You could also say the Gunners never replaced Robin van Persie, who left for Manchester United last summer. Van Persie was easily Arsenals best player and they havent quite looked the same without him. Costa is the type of marquee signing needed to at long last replace the Dutchman and placate fans still frustrated by Wengers sale of RVP to United. The Brazilian goal-machine has netted 23 goals in as many appearances in all competitions for Atletico Madrid this season and would step into the shoes left unfilled since van Persies exit exquisitely.