~32" at 2560x1440 is the sweet spot imo - same PPI/Dot Pitch as 24" 1080P Monitor (91.79 ppi)
Whilst doesn't tick the boxes regarding refresh rate, just picked up 2x iiyama ProLite XB3270QS for my work PC, they are a relatively inexpensive (~£260) option for someone wanting to try out the resolution (rather than committing to something nearly double the price).