Puget Systems have just brought the Echo III small form factor PC to market which could have many LAN gamers drooling thanks to its compact nature and high-end specs giving gobs of performance.
The Echo III is based on a ZOTAC H55ITX-A-E motherboard with options for Core i3, Core i5 or Core i7 processors. It can be configured with up to 8GB of memory, Radeon HD 5970 or GeForce GTX 480 graphics card, 2TB mechanical or 256GB (Crucial RealSSD) solid state drive (or both!), Blu-ray player/writer and more.
The chassis of choice is Lian-Li's very tidy PC-Q08 Mini-ITX and in order to keep all those hot, high performing components inside happy, Puget Systems packs the Echo III series with its Hydro CL1 closed loop liquid cooling system which you can read more about here.
The Echo III configurator page will let you fully customize the system before purchase to meet your performance/budget requirements.