Thanks for your answer. Due to customs and shipping droidX would be a bit high cost device, however I know that is one of the recommended devices.
I tried to find also windows based players, but they had also a bit high prices at this area. Cost effective can be Android players, however I already have one for just smart option for a tv.
Suddenly available ones:
MXQ2 tv box
MK808B Plus tv stick
TM10 TV box
What do you mean on much easier to handle the windows based ones? I would create the campaigns on a windows based pc or laptop, just the signage (client) side would be android based player with tv and later a tablet.
Can you tell me what do you mean on make it full screen, can this be a problem?