I received my new iMac 4k yesterday. It is replacing a MacMini from 2012. I got the 21” model with 16GB of RAM and a 512GB SSD drive. Beth is getting one as well and hers technically was here on Thursday but it was DOA with the 2TB Fusion drive not being detected. I returned it and will order her another one. I love having a retina display. I use an iMac 5k at work and now when I sit in front of a normal screen I hate it.