But now I'm realizing I might prefer a more neutral and propulsive presentation...
I would not think LS3/5a speakers would fit with this at all. Some excellent speakers off the top of my head in that price range that’d be much more inline with those goals would be ATC SCM19, Fritz Carbon 7, Joseph Audio Prizm, Usher Dancer Mini-X, but there are many more. Ditto the Luxman amp — my mind immediately went to Hegel although there are others. Then again, maybe the Luxman with the above speakers would give you enough neutrality and propulsion as it’s all about tastes/synergy, but the LS3/5a would be a non starter for me. The T+A DAC should be fine, and I’d add Bricasti or Meitner among others. Just some thoughts/ideas FWIW, and best of luck.

