I'm wanting to add a new external display. My 20-inch ACD still works great, but it just feels like limited screen real estate after all these years. My desk is a bit tight for the 27-inch model! That thing is big. Is there anything wrong with the 24-inch? I was going to order a refurb. It won't have yellow screen issues or anything no? Is that display considered a bad resolution, i.e. not as dense as the 27? Still a good product or should I just wait until I have a larger desk in who knows when. ha. Many thanks!