[Swordmaker]

They make good high display resolution, say this 28” 4K monitor at 157 PPI or 3840 x 2160.

http://www.amazon.com/PB287Q-28-Inch-Screen-LED-Lit-Monitor/dp/B00KJGY3TO/ref=sr_1_2?ie=UTF8&qid=1412826042&sr=8-2&keywords=4k+monitor

But it’s not a Retina screen level where 250 PPI at 20” viewing distance for a 21.5” screen would be about right for an Apple Retina screen iMac. . . Resolution of 4,675 x 2,625. That would be amazing. I suspect Apple may go lower. . . Maybe 220 PPI. That would be more than good enough at that distance. 4,114 x 2,310.

[MeshugeMikey]

Ive seen photos that ive made...on a retina equipped imac...and the resolution is near;y as good as a print

Thank you