I am usually exposed to live classical music weekly, so my ears stay in tune. This week 4 times. Monday was St. Petersburg Philharmonic/Temirkanov; this Thursday is the Beaux Arts Trio (Chamber), Friday is Baltimore Symphony (not Temirkanov), and Saturday is Choral; so a good mix.
Nothing compares to live music, so how do Tubes/SS compare to live to my ears? Tubes can tend to be bland and Solid State bright. Folks seem to primarily adjust tube gear by changing tubes; solid state by changing cables. I find it easier to get it pretty close to right with SS and cables. If I ever try tubes again, it will likely be a preamp only. For me the combination of tube pre and SS amp, can bring together the best of both worlds, without too much work/hastle.