Recommendations for Digital Signage?

Mark,
Sorry, I just now realized that I was not very specific as to where this signage will be. This is interior signage.
We would like to loop announcement slides as a way of publicizing upcoming events. I would like the ability to feed different material though each digital sign. Signage will be located in specific areas (i.e. youth, kids, young adults areas)
We are not looking to do touchscreen or interactive signs.
I was wondering if it was better to go ahead and get the all-in-one tv and signage players(i.e. Samsung) or should we buy TVs and the signage players separate (i.e. RiseVision)?