BTW, Ptss: You mentioned doing the cabinets in black.
Corian has a color called, "Nocturne" that can be
polished to resemble a Piano Black finish. Would look
sharp, with no visible seams and a 1/2" radius, on all the
corners. Personally; I'd dovetail the sides, top and bottom
and install the front and back with dado joints. Talk
about a solid/non resonant cabinet! I can send you a sample
piece, if you want to get an idea of how rigid, dense and
workable it is.