HP Z1 27" IPS LED-Backlit All-in-One Workstation, Intel Core i3-2120 3.30 GHz Processor, 4GB RAM, 500GB HDD, Windows 7 Professional 64-bit (Upgradable tp Win 8 Pro)

The HP Z1 All-in-One Workstation features a 27" diagonal display that snaps open to let you swap out parts and make upgrades. No tools required. Unleash your creativity with accelerated performance, 27" LED-backlit display that supports over a billion colors and HP's world-class reliability.