Hi. I know these lenses very well.
Firstly we all know what Baltar's and Super Baltars look like, pretty much any film shot with a Mitchell was either Baltar or Kowa. Even a lot of stuff in the 80s was shot with Super Baltars and Kowas. A lot of old Disney stuff like 'Parent Trap' and 'Moonspinners' and also most Hitchcock stuff was shot with Super Baltars. A lot of John Ford stuff as well. 'The Birds' etc. Also a lot of the early Fox Cinescope stuff like 'the robe' was shot with adapted Baltar's. They used Super Baltars on the TV show Cheers if you want to see a bad example. Also the Star Trek TV series. 16mm versions were used on 'Brown Bunny' by Vincent Gallo, however again its not to me the best use of them.
I personally like the Baltars from the 50s a little better than the 60s Super Baltars, but the Super Baltars are great. By the way the Kowa's are exact copies of the Super Baltars but have a slightly orange warmer coating. I think the Baltar's are a touch more dramatic and moody looking compared to the Super Baltar.
I have never seen the CM3 Baltars, but sound interesting.
Personally I prefer them on 35mm rather than using them to soften the harsher digital cameras.
Personally I think a beautiful image is a beautiful image, but these lens add some real magic that you may not instantly get from a modern lens. Also I use them with no matte box/filters and have not had too much problems with flare, but it depends how anal you need to be. If you want to shoot perfectly (if there is such a thing) and without character maybe stay away.