I also copy my backups from other machines on my network to the server in the closet. I recently located my Sony AV receiver into the closet and ran wires to speakers in the living room. Also I forgot to mention the server has a Radeon 7850 video card and I ran an HDMI cable to the tv in the living room.

This project accomplished several goals: centrally located server and network gear, wired network in the house is now all gigabit, Plex home theater working, large drive for backup storage, center for home sound system.

Future enhancements: ceiling mounted exhaust fan to keep the closet cool, networked stereo receiver, another large(r) hard drive installed in the server and a security system DVR and monitor.