Thank you for your input cjf.If your sound preference is more leaning towards Tube warmth then I think the addition of a Tube Pre-Amp with the XA60.8's would make for a very nice combo. You would likely end up with the best of both worlds between the XA30.5 and the XA60.8's where you get more power, better bass control and still have a tube like experience at the same time.
I use the Chord DAVE DACs, which is very transparent and fast, so think a Lampizator tube preamp will be a nice fit. Chain would thus be: Paul Pang Quad Switch > 432 EVO server > Chord DAVE > Lampizator Reference Preamplifier > Passlab XA60.8 monoblocks > Zingali Client Name Evo horn speakers + JL Audio E110 subs x 2. The subs cross over at 55hz and make a BIG difference on my music taste.
My speakers are modded with DIY crossovers and upgraded compression drivers. They have a 12 inch bass driver, and are 95dB, though they do seem to like a lot of current, not so good on smaller output tube amps.
My Headphones system, I use the LCD4 out the DAVE (sounds incredible) and the Abyss TC off a power amp (sounds even more incredible).
I may look at selling my Moon 600i speaker amp used as headphone amp and get the Passlabs XA25 stereo power amp, drive the Abyss off it's speaker taps. The Abyss off the Moon 600i is amazing, way better than any headphone amp I have tried to date.
So will report back when all is arrived and set up!