What do I need to set up digital music server?

Sonos does not support hi-res files which is indicated as the first objective in the OP. Logitech no longer makes Squeezebox (and hasn't for some time) so why get in bed with yesterday's news? As for "is it possible for a server to also be wireless" the word 'server' is probably not the best choice here, I think the word 'player' would be better, but in any case, the answer is yes.

Courage and patience.

Right now I am using a Musical Fidelity V dac II

This is a necessity. Unless your Dac has An "Asynchronous" usb input. It does make a world of difference (The v-link2 , which is what i use also ), versus the standard usb output to a Dac that does not have an Asynchronous input DAC

This is a really great thread. I just had the opportunity to listen to some 24/192 files at a speaker demo (ATC). Very nice!

I don't have any HD files like that yet, but I would like to move in that direction. I'm stuck with iTunes compatibility, as my wife uses iTunes extensively for her music, books, etc.

I look forward to watching the responses.

The one thing I could do to play the files is to add an eSata drive to my Oppo bdp-95, but the interface is clunky from what I've read. Plus, I have to figure out how to hook the eSata to my macbook pro (firewire to eSata?). I do also have the option of going into the Marantz AV8801. Or I could get a DAC, etc. as described above, or use Kijanki's suggestion. Hmmmm...

zd542 - Based on feedbacks from many customers and personal experience I have found that there are only a couple of really good neutral sounding USB cables. Unfortunately some of the best ones came from a designer that is not with us anymore, Lee Wieland. My customers tell me that the best cable is now the Revelation Dual-Conduit which is all silver and spendy.

Using Async USB, the theory says that the USB cable should not matter, but due to other factors such as RFI and common-mode noise, it still does.

Steve N.
Empirical Audio