I'm considering building an editing machine to be used to edit 1080i video. What graphics card would you recommend? i've always used 2 monitors and premier pro. i will still use premiere pro. i think we will use hdv video

i have decided on
cpu: q6600 overclocked to ~3ghz
mobo: msi p45 neo3-fr
ram: G.Skill PK 4GB (2x2gb)
hard drives:
- os: Western Digital Caviar Blue 80Gb 8Mb Cache (SATA-II)
- renders: 2x Western Digital Caviar AV Green Power 1TB 8Mb Cache (sata-II)