All TV's do accept composite, the only thing is that I am using an 8x8 matrix switch to distribute all the sources. I do have a Cat5 running to every location, I could use that to feed composite video to all TV's, the only thing is I would have to reprogram all pronto remotes to switch inputs on all TV's, which would take a while. So up-converting composite (or s-video) is the best option... if there is such an option
Thanks for quick responses guys.