Dell XPS All-in-one 27" for group table displays? Or dual-boot iMac? These would be used with an ASU type setup (2-3 computers at every table), which downplays large group (4-6 people) work and would focus more on pairs or groups of three. EGARC has a lab of 25 Dell Optiplex 9010 AIOs right now - not touch though, and not 27". http://www.dell.com/us/business/p/xps-27-2720-aio/fs
This Dell OptiPlex 755 desktop computer comes with an Intel Core 2 Duo 2.33GHz processor, 4GB of DDR2 memory, a 5000GB hard drive, DVD-RW optical drive, an integrated Ethernet LAN, and the Microsoft Windows 7 Professional 32-bit operating system.