RD-
Aluminum is the material of choice. Doesn't crack, can be anodized or painted, can be cut and bent with "normal" tools.
I did mine a couple years ago. Fortunately the original was aluminum, so I just cut a couple more holes for gauges and had it powder coated white. Took the panel to a local graphics shop where they made a custom switch panel decal. They were able to find my boat's company logo on some software they had, and printed up a really nice decal for the top of the dash. I was worried about them coming off or curling at the edges, but so far they still look great (but then again, I keep the boat covered

).
I used white faced Gaffrig's with blue bezels. Did all the wiring myself, and I'm no mechanic! Makes it look like a new boat, at least from the inside

.