I believe that an X5 is probably under production and the choice of dAC, amp were already chosen.
For the sake of discussion and for making X5 more competitive, dSD decoding is a very nice thing to have.
I also wish X5 will have a better infterface than X3 and please use a larger LCD display with better quality. My ancient H340 has a better display than X3 and it is hard to swallow this fact
1, the DAC is PCM1792 which is the best DAC available from TI.
2, The op am is OPA1612, for I/V, filter and op amp.
3, The amp is dual LMH6643.
4, The screen is 2.4'' IPS 400X360 ( better than others), in fact, the IPS displayer is used in blackberry 9105/9100 , which is the best IPS displayer we can find. and we have to purchase more than 100,000 pcs cause it is stocked sreen , seems blackberry purchased too many but can't used all.