In reply to Rob Parsons:
> For that matter, if you're serious about it, why bother with proprietary formats like ALAC? Or crappy mechanisms like iTunes?
Indeed. But my main point was to address mike123's suggestion that a wired connection from iThing to amp is critical, whereas I'd say the far greater improvement will be gained moving from lossy compression (MP3, AAC) to lossless compression (FLAC, ALAC, etc). Since he suggested iThings, I referred to the lossless format available on iThings; ALAC.
And if you're going lossless, then the storage requirements of a large music collection mean that you cannot (yet) store it on an iThing, and will therefore require a server, and streaming.
> but, at the end of it, it all really depends on what you're trying to achieve, what you're happy with, and how it all sounds to you.
Agreed. If you're a 'super ear and no instruments, oxygen-free, unidirectional, silver litz interconnect' audiophile type, you can spend stupid amounts of money. If you're rational, it can cost very little...
And some people will want perfect synchronism between rooms, and I'm not aware of an open-source system to do that yet.