PC to HDTV(older) Whats the best way to get 1080i though cables?

I have an older HDTV (Pioneer Pro-510HD). I want to get the best singnal from my PC to watch vids direct from my PC. The TV has a VGA for HDTV as well as Component jacks, S-Video, and regular RCA(R,W,Y). The Video card is an GForce 7800 GSOC(AGP) and has DVI, VGA, and S-Vido connections . let me know thw best setup please.. Thanks a ton.