I have an EVGA GTX 460 SC EE 1GB (01G-P3-1373-ER) video card..is it worth upgrading to the evga 560ti 1gb? I know there are no big changes from the gf104 to the new gf114 i just want you opinions! the 560ti will cost me about 100euros more..but is it really worth the money for the speed increase?