what kind of 1080i device are we talking?
The resolution is the highest that most tvs and consoles support, but the i means interlaced mode. Due to the fact that old tvs (when they were first invented) were not fast enough to update at a smooth framrate, the picture would be drawn every other line, then the other half of the lines would be drawn. When TVs got fast enough, p came out, allowing us to draw all the lines in order and results in a smoother picture. When we upgraded to 1920 x 1080, we had the same issue. I got a tv in that funny period when it could draw 1280 x 720 (720p) in "p" mode (progressive) but 1080 was in i (interlaced), and not p. My xbox 360 plays fine at 1080i. If you can, go with p.