Best graphics card for HD video or gaming on Intel DG31PR with c2d and 4gb of ram?

my work is video composing for songs and making 3d models in Maya plz. suggest me|||Well the best out there in the market are GTX 480 and HD 5970. But get an ati 5xxx series card or a nvidia 2xx series or 9 series card.|||i have the same board dg31pr , i m using nvidia gt 220 , ddr 3, i gb graphic card , which will cost in 4800 rs from nehru place delhi. i m aslo playing cod mw 2 with 2 gb ram on high setting|||Something like a GeForce GT240 or Radeon 4670 will be fine. Maya depends more heavily upon your CPU anyway.|||ATI Radeon HD 4890 will be great!!!Although it is nt the best in the market, but i am sure that this rig is capable of doing what you want on ur desktop...good luck