The DAC market is very competitive these days. In the higher tiers I generally found the very good DACs are both very technical but at the same time sounding refined, organic and not too "digital" or harsh. And it's not the laid back and warm kind of "organic", but again very technical and precise with strong instrument separation, clean background and open sound. I am actually starting to favour a very neutral and as transparent as possible amplifier with one of these bad boys DACs to do the "voicing".
There are so many and I would start looking at NAD M51, PWD2 (used they go for a lot cheaper than RRP - $1.7-2k these days), Chord QuteHD.
The Soloist/MJ amps are good enough to let you hear a startling difference up to something like a MSB Analog (this one I've not heard, just quoting friends). Obviously SQ also improves with better amps, so in the end one would want both at the highest level possible.