Well I think I have got it
Basically 1920x1080 resolution works - Put the logo in the middle, then write your text close to the bottom
It will look nice when the aspect ratio is 1080, 720, 480 sizes and for the odd station that is 800 x 600 it will push it up a bit since the total graphic sticks to the top of the screen but will look fine overall.
At that resolution and layout, it pretty much looks like the mediasignage one.
So for anyone looking to make one I suggest using this unless someone else has something better.