I have been reading up on this until my eyes are watering. HD vs BlueRay, 1080i vs 1080p 1080p/24/32 etc on many different sites. After all this (way too much wasted time...my wife came to check to see if I was OK!) I have decided to go with a HD format that does up-converting on SD's and does 1080i. Also while my TV is fairly new (about a year and a half) I don't have a direct 1080p input anyway and I don't even think there are any 1080p movies.
Personally I feel that this blue ray vs HD is a moot point anyway. Few movie companies will support only one format exclusively and I checked out those combo players and while they looked interesting I think in the end the movie will simply be offered in both formats (probably on the same disk). If they do I will just view it in SD and upconvert it. This stuff goes obsolete so fast anyway that it really does not matter. So my hd will be 1080i for the next few years...whew! I am glad I made a decision...I don't have this trouble with fishing equipment!