i have nvidia gt 220. and am wishing to buy gts 450 1GB..!! it coast around 7000-8000. is there any good cards with comparatively more performance in this rate"(7-9) i have i52400 3.1 ghz 4 core And 4GB ram so ply anybody suggest a good graphics card within that rate with both VGA and dvi port...!!! thanks in advance pls....