I own 5 Medialas DACs. Specifically Hyperports ranging in age from 14 years old to 9 years old and they work well with LSX. I notice that the frame buffer on these DACs sometimes gets stuck so if you stop a show mid-stream, you'll have a static frame being displayed. I would hope that Medialas corrected this design flaw in later revisions, but I don't know for sure. In any case, it isn't a significant problem in my environment and allowed me to reuse my earlier investment when I migrated to LSX.
Regarding LSX, after a learning curve, I'm sure you'll love it. There are lots of tutorials and folks available to get you through that learning curve here on the forum.
Best of luck!
-David
"Help, help, I'm being repressed!"