IBM 360/40
Oh, no...if you're gonna do it, make it something like the 360/91 or 360/195. The more blinkenlights, the better.
Cray 1
Didn't really have a front panel, tho. Several people have done a Cray-1 3d print case.
CDC 6600
Since the 'operator console' for the 6600 was a dual vector scope display (think giant oscilloscopes), this would be awesome.