Sony BDP-CX7000ES Blu-ray Disc changer is the best way. Especially in terms of video quality. The latest video cards can only do 10-bit. "Sony has a totally legit performance-enhancer - a feature called Super Bit Mapping (SBM). This feature processes a 14-bit video signal from the original 8-bit on discs. SBM eliminated banding effects as colors shifted from light to dark. I really noticed the improvement any time the moon or sun appeared onscreen: In such scenes, rough gradations are normally visible radiating away from the brightest part of the image. But with SBM engaged, the same transitions looked smoother and more natural - something that helps to separate this as a flagship player."
J river just needs to make it like MyMovies, so we can use this changer with RS-232. I have requested that feature, but not seen it yet. Finding this changer is not an easy task, since Sony discontinued them last year.
Anyway, your menus would be available with a changer. I own 3 of these changers, and it was much cheaper than putting Bluray movies on the hard disk.