First post, I put together a starter head-fi system this year, after lurking on this site for a while, as a visitor. Started with a Sonos connect and Schiit Vali 2. I went the Sonos route due to already having some other Sonos kit, plus I like the simple interface.
The other reason for Sonos is the lower power usage compared to a full computer, my music is stored on a 480 Gb SSD connected to a Synology NAS, again doesn't draw much wattage compared to computer. Only use a computer to rip my CDs to FLAC format.
I managed to get a good deal on some Sennheiser 598s as first headphones, am enjoying the experience so far.
Early on I replaced the tube/valve that came with the Vali 2, 6BQ7A/6BZ7, I've tried some cheap 6N1Ps & 6N23Ps, wasn't that keen on those, currently got a 6FQ7/6CG7 GE USA installed, am liking this a lot.
Didn't think I would get into the 'rolling' thing, but over the months, I've bought, but not tried yet the following:
6922EH Electro Harmonix Gold
ECC88/6DJ8 SIEMENS
PCC88/7DJ8 PHILIPS NOS
Another recent purchase is a Schiit Modi 2 Uber, am using TOSLINK out of the Sonos into the Modi 2.
Just to say thank you to all, for the help you didn't know you'd given, am really enjoying my headphone experience.