Uberclok Reaktor PC (preoverclocked)
 

A small company based in Chicago with five employees, Uberclok are specialising in pre-overclocked systems for consumers who want mainstream components with ultimate performance. There are currently two models in the Uberclok range, the Ion and the Reaktor. The Ion starts at $1660, the Reaktor at $2500, each with numerous configurations to take the system as high in performance as possible.

Today we have a Reaktor system on our test bench configured at a cost of around $3600.

http://www.driverheaven.net/reviews/uberclok/