advice for showing stills on a tv

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I am in the market for a large flatscreen tv in order to show still photographic images to people in my office. I have a full open wall and want to mount a screen to it, with it hooked up to my pc or laptop to go through the images. Any advice on brands, size, options I should look for or look out for? I need a correct color representation and the ability to use as a second screen from my computers. Anyone else do this if so what kind of tv do you use?

Thanks,

Amanda