Most cost-effective way audio, video & control over structuring wiring

I have the following infrastructure in place:

• Structured wiring to each room (2 cat5/2 coax)
• PC-based music server with stored WAVs and multi-output soundcard (Delta 410)
• Wired home network
• Wireless home network
• 2 telephone lines
• OTA HDTV/FM/UHF, etc. antenna
• DirecTiVo
• Existing stereo systems in all rooms in which music would be played (some connected to ceiling speakers)

I would like to be able to distribute line-level audio, baseband (or better) video, and system control to each room. I chose not to pre-install keypads in any rooms, btw.


So, my challenge is to find the most cost-effective way of distributing sound, video, and control to each room, given that I'm already using some aspect of the structured wiring system to distribute the LAN, antenna signals, and the phone lines to each room.


Here are the target rooms and what's available for distribution:

• Kitchen: 2 cat5, 2 coax available
• Bedroom: 1 coax, 2 cat5 (1 coax is dedicated to the antenna feed)
• Study: 2 coax (Cat5 is taken up by phone and LAN)

This leaves me with a Duke's mixture of transmission methods for line-level audio, video, and control. There are plenty of available choices, none of which are perfect: line-level via 2 coax runs, line-level via balanced line drivers over cat5 cable (video this way too); modulated video/audio over coax; etc. But I also need to control everything!


Right now, I'm leaning toward using wireless LAN and PPCs and touchscreens for control.


But I still need a method to distribute audio & video and a means to control what sources go where.


Perhaps a matrix switcher with serial control that I can control with my PC and wireless devices? Or PC software to control my audio card?


Any other ideas on how to skin this cat, short of an expensive proprietary system? Suggestions as to software, or to available matrix switches?


Thanks,

Ken


[edited for clarity]