Re: USS Copernicus, NCC-640 or 623?
"Actually, you bring up a good point: Will the later seasons, with much more heavily-laden CGI space scenes, have to be redone for HD?"
Foundation Imaging provided the CGI for seasons 6-7 of DS9 and seasons 3-7 of VOY. The company was dissolved in 2002, their CGI work is considered as lost.
Thus for HD the work would have to be redone.
"The first duty of every Starfleet officer is to the truth" Jean-Luc Picard
"We can't solve problems by using the same kind of thinking we used when we created them." Albert Einstein