Celabs has a good selection for signage, I have used them for quite a few menu boards. They have pretty good margins also. Tech support has been very helpful when I have needed them and the software is pretty nice also. You can create just about any kind of layout you can think of and can be changed or updated remotely from the software or scheduling. I have used some with built in tuners/inputs and the very economical one which I believe is the mp70, all have been pretty painless for me.