The Bryston DAC would be pretty good for what you are looking for. I've owned the Wavelength Cosecant and I think this one sounds better.
5 responses Add your response
Though your preference is warmth, given your requirements you might consider the Benchmark DAC1, in its various iterations. The DAC1 Pre, for example, I believe has 5 digital inputs, incl. USB and Toslink, and one analag stereo input (RCA). Pristine pure with great dynamics, one of the most widely reviewed and highly regarded dacs in recent memory. Check out the Benchmark Media website for multiple rave reviews.
Also has a great built-in headphone amp to handle up to 2 sets of phones and can be used as a standalone preamp too.
I have one and use it with multiple sources and it has been amazing.