Yeah, 1920x1080i is really bad when I use my hdtv as computer screen. I couldn't read the text because they're very small and flickering. However, it's totally awesome when watching 1080i programs. My card is actually a Leadtek card and does have the 6 pin p/s2 proprietary port. It also came with an adapter to YPbPr cable. However, using that cable, tearing still happens just like in DVI. Not annoying though. This is the reason I want to buy the VGA to RGBHV cable, hoping that I might be able to get rid of tearing.
I will try progressive next time.