Most satisfying system change in 2017?

Built speakers, TMW config.  Crossovers are modified from Icon Parsecs. Drivers from Seas, ScanSpeak and Audax.  Stunned at the results.  IMHO they compete with factory towers @$10k. 
(Unavoidable pride/bias I suppose, but verrry gratifying project). 
Timbre and detail..can’t get any work done cause I can’t walk away. 

Iwal22, can relate.  How did you solve potential cabinet issues?  Biggest challenge in my experience.  Pictures online somewhere?

Change from 20 yr Spectral owner to Pass Lab.

Added a Tru-lift tonearm lifter to TT. Makes playing vinyl almost as easy as CD. No adverse effect on SQ. 

Added a Schiit Audio Freya Tube Preamp and a Primaluna Prologue 5 Tube Amp.I use the all tube ckt for music and have even left it in the mix on some Movies after I had played some Dvd or Bluray concerts.Pretty sweet but,for Metal I go back to the SS Ckt.

+1 the single repeated most satisfying change: ROON