The gMax was designed by an architect who became tired of being limited by the build volume of his Prusa.

gMax specs:

Filament size: 1.75mm
Filament type: PLA, ABS (though no heated bed)
Machine size: 28.5″ x 24″ x 21.5″
Build volume: 16″ x 16″ x 9″
Max print speed: N/A
XY precision: N/A
Minimum layer thickness: 0.075mm
Software: open source chain
Other features: LCD screen and sD card reader
Price: $1295 (kit)

Website: gMax