Most satisfying system change in 2017?


What was your most satisfying addition or subtraction for your audio system this year?  Looking for changes in gear, set-up, or listening environment.  What floated your audio boat in 2017?
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Atma-Sphere MA-1, and MP-3, Vandy Treo's, converting McCormack DNA-1's into monoblocks, Equi+Core 1800(just installed).

It's been a busy year.
Bob
Exogal comet plus DAC/preamp and subsequent insertion of sr black fuse!
Woah!
Then just last week I built a new rack using 2 inch maple blocks which surprisingly made another large difference.
My news speakers, first in 10 years, Audio Note AN-J/lx's. The AN DAC-3 signature I picked up for a song used close second.