Network video receiver to show streamed video on multiple TVs?

I have a PC containing video files that I want to be able to play on various TVs.  All of the TVs are connected to coax that is run to the location where the PC is.  I want to be able to play different things on each TV, so the TV output on the video card won't work.  Ideally, I'd like to find some sort of box that would accept MPEG streams from the network and output them over the coax to the TVs.  I assume I could stream from the PC to this box using something like VLC.  I found a few boxes that will do this, but I'd like to find one that will accept multiple input streams and has multiple coax outputs.  Composite output would also work since I could use an RF modulator, but coax is highly desirable both for the cost savings and less complexity.  Ideally, it would be rack mountable as well.