I believe I have everything set right then there were a few setting options different on the 93 but your 990/83 guide covered a lot. My Samsung PN58C8000 has what's called Cinema Smooth for 1080p24 content but professional reviews have said it causes a loss of black level performance and I've never been able to find out if Samsung has fixed this or not so I've been leaving it off.
I've generally avoided 24Hz modes that "smooth" the video, which is probably what your Samsung is offering, because they tend to affect the video picture quality. With my Sony TV, I can disable that mode and still send it 24p video - the TV just shows each frame five times.
I'm assuming if I want to listen to cds then I don't have to change any settings just let her play.
Yep.