My best addition was a pair of Klipsch Heresy one speakers that I picked up used and which turned out to be perfect mates for my Firstwatt F6 amp. Second was the discovery of Raspberry Pi Zero 2W small board computers, which can be configured with Ropieee software and made to serve as extraordinarily good Roon end points. In the wings, but not ready for judgment yet is the Elekit TU 8900 300 B/2A3 amp which I built this year and has opened the world of 300 B tubes to me. It is good but I have not decided if it betters my Firstwatt F6 yet. However, it does seem like an excellent mate for my Lii audio F-15 open baffle speakers.