I bought a Headroom Micro DAC when I needed a more portable setup. I've been slowly upgraded to a home based setup. My current kit:
FLAC -> Squeezebox (SPDIF out) -> Micro DAC -> Graham Slee Solo SRG -> HD 600 (Cardas cable upgrade)
The upgrade bug has just bitten again. I've just bought a set of HD 650 headphones.
1) Would I notice a benefit in upgrading the Micro DAC to something like a Dacmagic, Matrix Cube, or an Audio GD NFB 3?
2) I've read recently that a top end CD player can output a better quality "digital" signal than a wireless stream from a PC to a receiver like the squeezebox, something about jitter as I recall. Is there any truth to this? I had thought that it was ones and zeros and that was it?