O.K., no love at the home theater forums, so I'll give it a shot here...

I'm looking for a large--55-inch or so--to display still images in my gallery. I want to be able to play a slideshow. I'm looking at 4k screens like this one: http://www.amazon.com/Seiki-Digital-.../dp/B00BXF7I9M. Also willing to go 1080 p if 4k won't work (new 4k's don't seem to be coming out until August or so...)

But am having trouble finding anyone displaying still images. I'm trying to answer the following questions:

1) Do the screens display the still image at 4k (if the file is large enough) or do they automatically downgrade the still image to 2k?

2) Do the screen shave an SD slot or other input capability?

3) Do the edges of the screen, where the screen is black, show unevenness?

Looking for the cheapest screen that will display great still images...its capabilities as as video screen are secondary.

--Darin