Need HDMI, Audio, and USB Extender

Hello,

I have a client who needs a new computer. He has a fancy office with his huge computer in a closet connected to his office. Currently there is a device that extends VGA, USB, and Audio plugs from the current machine in the closet to his desk.

I need to replace his tower and monitor with a new super pc so I need to extend HDMI, USB, and Audio to his desk. It can be wireless or wired on the extension part. The new computer has a Radeon HD 6870 Graphics Card so that might send the audio and video over hdmi, but I need a way to break that out on his desk to speakers as the new LED monitor does not have speakers built in.

The monitor is just HDMI, so I could use an adapter to convert that to DVI as on the PC end there is both HDMI and DVI.
I cant seem to find something online that meets this criteria, there might have been one but it was 1500 pre cables.

Please provide part # and website where I can purchase this

Thanks