One 'warning' though; with nvidia, you will most likely not be able to do 1920x1080i through DVI, many have tried and failed. ;-( (Obviously me being one of them..) (I'd very much be proven wrong, but so far, I have not heard about one single sole that has been able to do this)
Yesterday I ran 1080i60 with Nvidia GF6 6600GT and DVI. No problem, all HDTV titles and games played nice, but OS was WinXP (and no powerstrip -> default driver timings offered for HDTV by NVidia, driver implemented underscanning also worked fine).
I have also ran 1080i with Linux, GeForce4 Ti 4800 SE and DVI. But overscan on my projector was so large that I could not use computer via that so I changed to native 1:1 pixel mapping (1366x768). I can re-check my setup with 1080i and latest NVidia linux-driver.
Display is Sony VPL-HS10 projector, with 10m DVI cable.
Best regards, Jori