HI all, I am a new subscriber to this forum, but have been reading it for some time. I have found the HDTV threads very interesting, but there is a question that I have regarding the two formats and their transmission. I recently purchased a 50" LCD projection hdtv that is capable of displaying both 1080i and 720p. I prefer 720p, so I have the converter box set to transmit to the tv in 720p. However, I cannot tell what hdtv format is being transmitted to me (it may be 1080i or 720p). Since my converter box is set to 720p, if you query the tv as to what signal it is receiving it says 720p. Also, as you would expect, if you change the converter to 1080i, the tv then responds that is displaying in 1080i. My question is, let's say that the incoming transmission is in 1080i and I have the converter set at 720p, what is the converter doing to convert the picture to 720p, and is there a positive or detrimental effect in viewing quality to do that? I guess what I'm asking is, if I am receiving a 1080i signal, should I set the converter to transmit native 1080i to the tv, or is it better to set the tv to the format that I prefer (720p), or does it really matter? Thanks and regards, Kris K.