Most satisfying system change in 2017?

Upgrading from unshielded Volex power cables to unshielded Signal Cable MagicPower cables on all my sources, phono preamp and main preamp.

Mastersound monoblocks PF100. Biggest upgrade ever on my system.

@uberwaltz Was the Exogal fuse swap difficult ? What size and spec would other comet users need ? Thanks,mike.

Upgrading from Golden Ear Triton One to Golden Ear Triton Reference speakers. Made possible only because I was able to privately sell my T1s at a good price.

Tekton DI upgraded speakers, Cerious Technologies Graphene Speaker Cables as well as GE interconnects, BAT vk 55se, and last, but not least, I plugged my pre amp into the same outlet as my amp and that made a huge difference in sound as well.