You need to look for a professional line of plasma, or possibly a higher end unit with removeable speakers. they are typically classified as monitors instead of TVs and alot of them use BNC connectors instead of regular composite/RCA.

As stated above you are looking for a PRO model. Get ready to spend some real $$. Pioneer Elite is the big dog of Plasmas and is available without speakers as a monitor. I believe the 50" is around $ 8,000.00.

Not really that much expensive...see that Panasonic model at Costco that is 50" for $1500.

Here is a link that might be useful: Costco 50 Panasonic

make sure you get HDMI input. you will be severely limited with analog only inputs.
nice 720p monitor, but no inputs.

Dave