That depends on the size. Generally speaking people view monitors at a fixed distance, you don't move further out from your desk with a 32", just like you don't the with triple monitors. So really density is way more important than resolution. Hence if i was looking for a 25"or smaller monitor I'd say 1440p. If it was over 28" I'd say 4k 60hz. If both options were 27" then i honestly don't know, leaning towards 4k though.