We had been buying the HP Prodesk 600 G2s (i5 3.2Ghz 6500, 8GB DDR3, 500GB HDD)
We have a few public facing areas, and other areas where clients are located and decided that something smaller and less intrusive would be better and for those areas we get the HP EliteDesk 800 G2 (mini, i5 3.2Ghz 6500, 8GB DDR4, 256GB SSD) because we are mounting them on the back of monitors.