Yep, the Soloist is what I came upon by chance. Given the high praise I have seen I am left with the impression that it is unbeatable in it's price range.
I'm not too interested in going down the rabbit hole again. Just reading a couple threads here and there. I'm pretty much determined to go down one of three paths:
1) The Dacmini CX (or PX) is looking more and more like an attractive all-in one solution. Can always throw in an amp later if I feel it's justified. There are a lot of "mods" that can be made to it to add confusion, however... there's always something.
2) The Burson Conductor, which has the Soloist's amp and contains a DAC as well from my understanding. I only just discovered this, will have to investigate more.
3) Schiit Bifrost with Uber Analog upgrade as DAC. Amp undecided in this particular configuration. I'm a bit wary of this one as I'm concerned that pairing this with a Schiit amp will be overly bright and far too fatiguing for prolonged use.
I suspect I'll upgrade from the HD 598's to the HD 650 at some point, and perhaps (but not likely) the LCD-2 afterwards.