There's precious little to change since any change would necessitate the sale of gear. 
 
Headphone Rig 
Transport: Arcam - would only make a change if it fails somehow. 
DAC: The Hertsens - not going to sell it. 
Amp: The Menace, not going to sell it. 
Headphones: HD650s + HF-1s, pretty content with these for as much time as I get to spend with them. 
 
Soldering Rig 
Source: Duet - better than it needs to be so why change? 
Amp: SimpleSE - can't see any need to upgrade or change this, ever. 
Speakers: ok, you got me, these will change, but the new ones are bought and paid for already so it doesn't count.