I don't know, I'm not in the economic class that can afford things like that so I wouldn't even consider such a size. With the added distance requirement I don't think I could even fit one on my desk. Is 27" the comfort sweetspot then?
Depends what you want to do! If you have the eyesight for it, you can fit a lot of code on a 2560x1440 panel & because it's IPS you don't get a colour shift from looking at oblique angles.
Dell U2312HM 23" IPS LED Monitor - £187.66
...and similar ones. I remember there were quite a handful of them when I was picking mine (I bought a ViewSonic one because it was the cheapest swivel option).