Thanks ZD. My budget is around $2k, hopefully used. Thia is for a simple bedroom system, and I don't want to go overboard on it. On the other hand, I'm semi-embarassed to say that it consitutes about half my listening.
I'd like to have several inputs. Sources include: airport express optical (with possible reclocker), sqeezebox (coax or optical), Fiio X5 player (coax). I don't think I need USB, but you never know. The W4Sound has all the features I need, I am just wanting to improve the sonics as described. As mine is the original version, one option is the SE version (with or without the FEMTO clock). I will check out the Wadia and the DCS, though I imagine the DCS will be too expensive. Small footprint is also a big plus, as this is a bedroom system.