*sigh*
I've got this 36" Gateway Destination monitor (max res 800x600) waiting to be used in a DC cab...  someday...  Got my hacked controls..  Got my controls...  Got my games and an extra DC...  ALL I need is money and time  
Looking forward to seeing what you come up with.  mako, I really like the top slot for putting in the VMU...  Very cool.
my friend has one of those as well, and is in the process of building a showcase cabinet for it.  it is an awesome monitor..the only problem is, he built a stand for it, and a control panel, so now it is playable, so very little progress is being made on the cabinet.
to get back on topic, i love the color scheme on that cabinet.   a dedicated dreamcast cabinet is an awesome idea..i'd highly reccomend going with a pc monitor and vga adapter, the picture quality is amazing.  although there are a few games that don't support the adapter, so be prepared for that. (MK Gold comes to mind)