Here's a list of computer monitors that are great for photography and photo editing.
They're pretty pricey though.
Asus PA328Q,BenQ SW2700PT,Dell UltraSharp U3415W,NEC MultiSync PA322UHD,ViewSonic VP2780-4K,BenQ BL3201PH,Dell UltraSharp UP2715K ,NEC MultiSync EA275UHD
For the cheapest one I would go with the Dell UltraSharp computer monitor for photography.