Agear - I have an "about AE" page that describes my system and has a photo. It is not up to date though, since I now have custom 805A SE monoblocks. Soon to get Vapor Audio Nimbus speakers too.
The best way to play files is probably wired Ethernet. I am currently designing a network renderer for this purpose. My products, including the Overdrive SE can be upgraded to change out the USB interface for this network renderer, called the "Interchange".
Storing files depends on the playback. Generally the best way is to have them local to the computer, not NAS, and not USB if you are using USB interface. If you use network interface, then USB or firewire access to the drives is fine. IF you use USB, then Firewire to the drives is best IME.
Steve N.
Empirical Audio