If you can afford an X0, go for it. NOW! 😄
If you can grab instead an X9, I think it’s the best of the bunch, better than HLD-1000; then S9.
S1 was a reference player (can’t say if it’s better than the previous models), but if you can find an S2/X1, it should be a lot better, though.
I’d go to the LDDB forum and ask for help, there are many experts that could help you.