Most satisfying system change in 2017?

Added a Finale Audio 7189 MK2 (7189a/EL84) integrated amp as 3rd amp in my main system; very pleased. 

Also, swapped in some Sophia Electric 6SN7s into my Modwright LS100 preamp; very pleased with them as well

To those that have done multiple upgrades, were these done at once or over the course of the year? If at once, did you listen between installing the new additions to see what changed?

@uberwaltz, what to you like about the nordosts? Which line did you go with?

@ghosthouse care to share your impressions of the F7? I’ll be in the market for an amp next year and my speakers are 98 dB sensitive..

Synergistic Research Black Fuses.  Believe it.  Those just amazed me when all I was expecting was maybe a mild bump. 

Had several changes this year. The biggest just happened as Bob Smith at TDSS put the Level 3 mods into my Nuforce Ref 9 V3 SE mono amps about a month ago. The sound continues to improve as the power supply and wires break in more. It is more resolving, dynamic, and even more quiet with stronger, better defined bass.

Added 5 SR Blue fuses to my amps, MW 5400 CD, and Whest 3.0 RDT SE phono pre--made the sound much more beautiful, fuller, more dynamic and detailed.

My VMPS RM40 BCSE speakers have never sounded better.

Going with all Cerious Technologies Graphene Matrix cables was as big as any component Change.