Seemingly based on the Wallace RepRap, the Buildabot Revolution from York 3D Printers features an aluminum frame and T2.5 pulleys for maximum rigidity and smooth operation.

Buildabot Revolution specs:

Filament size: 1.75mm
Filament type: ABS, PLA
Machine size: 390mm x 440mm x 530mm
Build volume: 210mm x 210mm x 160mm
XY precision: N/A
Minimum layer thickness: 100 microns
Software: open source chain
Other features: aluminum frame
Price: ~$1540 (~$2160 fully assembled)

Website: Buildabot