4K resolution is barely an adjustment from HDMI with the right setup. I've seen comparisons between standard HD and 4K, and I can tell you from first hand that when running on a 7990, the difference in quality is nowhere near the price gap. Instead, buy 3 42 inch TV's with low ms readings, turn them to portrait and put them next to each other. Or buy one and keep it landscape, then buy two smaller (I think 22" but I'm not sure) with the same border thickness and put them next to the TV as peripheral extensions.