I think TheDuke has the best build there. The lack of DX11 will not hurt you, as the 5750 is too weak for DX11 games anyway. You'll get better overall performance from the 4870.
I would take the x4 965 in combo thoughhttp://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.516534
It's going to serve you better in games and other apps that are not multi-threaded.