$18k Tube preamp for large scale symphonies please

An essential feature for me in a linestage is well implemented support of balanced inputs and outputs. By "well implemented" I'm looking for low output impedance and, if possible, galvanic isolation of the outputs such as via transformer coupled outputs. Since I like the capability to bi-amp, having a volume control on one of the outputs would be a great bonus. Even if you don't need these features right now, these may be something to keep in mind if your systemm veers in that direction.

Another overall system requirement, again for me, is the ability to reverse absolute phase on the remote (and yes remote control is a must-have for me). Ideally, this would be provided by the linestage, but failing that, the DAC would have to provide the capability. In that case, however, you're left without the ability to remotely switch polarity for non-digital inputs. The impact of absolute phase has become more important as my system has evolved.

I'm also evaluating linestages and appreciate all the input to this thread.

One needs to be at the listening position to compare the sound of the alternate settings of absolute phase. There's no consistency in how absolute phase is oriented on recordings. Sometimes it isn't even consistent from track to track. That makes for a lot of back and forth to switch/listen/switch. Doesn't it make sense to put the phase switch on the remote?

My experience is that a preferred absolute phase setting versus the opposite is easily audible on the great majority of recordings, true stereo, multimiked, mono, whatever. Now, we may have a semantic difference where the effect to which you refer may not be the same effect that I'm describing. One point, the ear is somewhat less sensitive to compression versus rarefaction. In any event, if someone doesn't hear a difference, that's OK by me.