Here's my little bit. I have an older Micromega DAC 1 and installed the Burson Audio opamps. Totally changed the sound and very pleasantly surprised.
An antiquated DAC or an affordable recent one?
An inexpensive digital to analog converter is next on the purchase list. Should I opt for something new, (such as a Musical Fidelity V-Dac or Cambridge Audio Dac-Magic) or retro (like a Theta Chroma 396, Ps Audio Superlink or Adcom 600)? It is now, sadly, only listening via Sennheiser Hd 580 and Creek OBH-11, with a cheap Cd player. Rock and pop are the musical tastes.