Stamper said:

I DL the russian hdtv, what is the best format to reencode 1080i to progressive, 720p or 1080p? I assume 720p as 1080i to 1080p would just add extra size.

From Russia, would it be 1080i50? If so, it can be converted to 1080p25 with no loss and at the same size.

If it's 1080i60 hard-telecined then it can be converted to 1080p24 by applying IVTC (and the file size would end up smaller - hard-telecined 3:2 pulldown has repeated fields so not very efficient).

No need to downscale to 720p.