Need help with digital music setup for house

All, thanks in advance for any help.
I am looking to change to a digital based music library, just cd's and some iTunes now. If anyone can point me to articles or other place to read up, I willing to do, just difficult to find comprehensive direction.

Goal is to have digital library of music available on all 4 floors of house. Attic room is where best permanent system is. First floor is next most important. Not likely I can hardwire all locations together. Will give up on networked solution, if updating each location with expanding library is fairly straight forward

Background:

Attic room equipment:
Musical Fidelity A5 amp and cd player;
Anthony Galloway 3.1 speakers;
Power conditioner:
Apple tv;
Pioneer Kuro 60 "plasma:
Cable TV box, and wireless internet;
DELL laptop that can be dedicated to music.

Goal: best quality flac, dsd sound, add turntable, NAS. Ideally have similar convenience of preview/downloading music on TV with apple remote.
preliminary thoughts: ifi dac or pro, teac or marantanz dac. Does copter based system limit tv monitor use with a remote.?

2nd floor bathroom;
Built-in ceiling speakers,
Outlaw audio receiver;
Multi disc cd changer (poor condition)
Goal:play digital music from same digital library )
3rd on priority list and doesn't factor into budget.

1st floor:

Building book shelves (think library style) for wife. Want to build in wall speakers for clean look (Martin logan).

Goal:
Wife will want cean, compact, fewest pieces of equipment with easy to use and sort/select music system, with display to see selection. Play digital music from same library.
Preliminary thoughts: integrated music server (with amp, dac, and storage)

Basement:
Utilize old, but working nakamichi 40 watt receiver to,play digital library.This is 4th on priority list and doesn't factor into budget.

Budget for Attic and 1st floor: $2500-3k.
other rooms , later at least expensive cost.

Thanks again.