That's the answer I was looking for, thanks.If your TV is not capable of displaying 1080p, there is nothing you can buy that will make it display in 1080p (aside from a new television).
If your component is outputs 1080p, the picture will be down-res'd to something your TV can handle.
My TV is 1080i also and the information that I "understand" is 720p/1080p should be used for sports and everything else is up to your personal desires. Normally I was watching everything in 720p which was fine but now that I started watching in 1080i for other than sports I'm very happy.1080i is good enough for me anyway.
Unless you guys have CRT based TV's or an old Hitachi plasma, you aren't seeing 1080i at all. All fixed pixel displays made today are 720p or 1080p. Just because it will input 1080i doesn't mean it is 1080i (after all, 1080p sets will take in 1080i signals just fine). They simply take in the 1080i and convert it to the native 720p or 1080p resolution of the set.