Ok so there are alot of options for builds out there. You can start with what is mentioned at computer audiophile -
Link. Another option is
Small Green Computers.
Now if you want some machines that are close to being prebuilt you have the
Intel Nuc and these new fanless
Foxconn...just add memory, hd, and OS and your set. Downside you can't add any internal cards but might be good starter systems.
Which leads me to not sure which route I want to go -
Option 1:Case: Realan E-i3
Motherboard: Intel DN2800MT
Memory: DDR3 4GB RAM (991644
SSD: MKNSSDAT60GB-DX
Power Supply: 60W, 12V (PW-12V5A-L5)
OS: Win 7 64 bit or Win 8 Pro 32-bit
Playback App: Probably Start with Foobar and then maybe go to JRMC v18
Option 2: Foxconn Brazos AT-5570, add ssd, memory
OS: Win 7 64 bit or Win 8 Pro 32-bit
Playback App: Probably Start with Foobar and then maybe go to JRMC v18