Main computer:
MacBook Air 11" with 2 Thunderbolt displays. Use Safari to browse, Eclipse to edit java code, Omnigraffle to do diagram, VmWare to run VM.
Game Computer:
PC with AMD-FX 8350, radeon HD-7970 32 Gigs RAM. 27" Samsung monitor (2660x1440). Play all games well even it still 3 years old.
Server:
Mac Mini + 2x Drobo storage.