+1 for the CODA CSIB and the HS, I have the V2 driving the HS, but I suspect the V1 is slightly sweeter with more Class A bias. To the OP, the CSIB is a very smooth sounding SS integrated with more current than you’ll ever need (70+ amps!), and retail for around $6K new so a relative bargain these days. 65 lbs of metal, a 10 year warranty and made in the USA (Sacramento CA).
BTW, there are a few queries above as to the quality of your digital source chain, and I concur that would be an area in your system that should be at least on par in terms of $ with the rest of the components of your system. The HS are demanding and reveal weaknesses in anyone’s setup, so perhaps whatever you feel is lacking might not just be a lack of grunt from your PrimaLuna.
Regarding your query regarding a CD transport vs streaming, IME they are equivalent, though a good transport is a bit cheaper on average than an equivalently good server. As for your DAC, I’ve spent the bulk of my $ on DACs (and the digital source chain in general), and am very happy I did as the sonic payoffs relative to other gear upgrades have been very clear to me in my system.
Also maybe try cable and isolation tweaks before making a huge investment, they often work for me, at least more often than not. Case in point, I recently bought some Transparent XLR interconnects, and they have been a wonderful addition to the synergy of my system.
