http://www.eclipsecomputers.com/subc...20Center&cat=3
this place I have linked to before has a large range of cube/desktop/mediacentre cases that are just that cases you can built anything that fits into them. A lot of places sell cube cases complete with mobo
http://www.eclipsecomputers.com/prod...de=CA-ECUTE-SI for example
http://www.eclipsecomputers.com/prod...e=CAA-CSBLOCKS
perhaps a desktop case may suit so you can put your screen on top to save space?
http://www.eclipsecomputers.com/prod...code=CAS-LC03B this is full size midi. Note the vents on the side sp the screen will be ok on top
http://www.eclipsecomputers.com/prod...de=CAS-LC04B-A slimmer
anyway loads on that site. If you do decide to use them call them make sure the stuff is in stock before you order