Dell is pushing a wet noodle uphill. You can get a 40" 4K Samsung TV with uncompressed color support (K6300) for as little as $350 when it goes on sale. Resolution is a tad better than the 27" Dell monitor at 110DPI, and input lag is respectable. The 40" screen is truly a sight to behold, making a 27" DELL monitor look tiny in comparison. Having a remote to adjust settings is far superior than the torturous buttons found on DELL monitors. As for Color...I think it's actually better than my U2711 Dell UltraSharp monitor that it replaced. VA (Vertical Alignment) panels have more contrast and deeper blacks than IPS panels, although viewing angles aren't as good, but that's not a problem for monitor usage.
One caveat...You need an HDMI 2.0 port to support the 4K resolution. And only one of the three ports on the TV supports uncompressed color.
Don't believe me? This site: www.rtings.com\tv reviews is how I found my 40" Samsung 4K Display. They really know what they are talking bout.