If you're looking for a DAP that sound more organic than the DX90, then I would recommend the X5. It sounds more analog/old school/vinyl, and is also quite neutral. With the new firmware and plenty of burn-in I'm happy to report that I find the X5 quite neutral as well and a very nice combo with the FSP (I'm sitting at Starbucks and listening to this combo right now as I type this). It's probably the best $700 value combo in the audiophile world today.
From my perspective I think the Sabre based DX90 may not be organic but it sounds very natural/clear/transparent/silky. A very hard thing to do and that's why I think people love sabre so much.
Edited by M-13 - 8/16/14 at 12:58am