I'm about to buy a new mac…I use my 8 year old 24inch iMac for a lot of photo work, InDesign and the usual small stuff. My desk in my study is 80cm deep (a touch over two and a half feet) and despite spending some time in the apple store this afternoon I can't get over the feeling that the 27 inch monster, despite having better spec, would be just too much on my desk. So I'm tempted to have a 21.5 inch 4K machine instead. Does anyone whose got the larger screen feel it's sometimes just too big? Or would anyone with the smaller one wish avidly that they'd gone larger? I know it's horses for courses, but the forums are awash with people who can't make their minds up, and now I'm one of them! Would love a little input. Thank you!!