What an awesome color scheme, Beamer ... thanks!
But I'm an old fart, so I plan to do something more subdued. I'm no "Optimus" as a guitar player, and I'm way past my "Prime".
1) The cabs will be made out of 3/4" maple plywood, and I'll use my router & jig to dovetail the joints for strength. The head will be 10"H x 26.5"W x 12" D. The speaker cab will be 32"H x 26.5"W x 12"D. The width is determined by the existing size of my Peavey, so that the hardware will slide in and fit properly, without undue fuss (as Malcolm Reynolds would say).
2) The wood will be stained with a charcoal grey stain, so the grain will be seen clearly. After that, about 4 - 5 coats of Varathane's "Diamond Coat" water-based semi-gloss finish. I built an all-oak stairway system in our split entry home almost 10 years ago, and used this stuff on it. The treads show very little sign of wear yet ... awesome product!
3) The cabs will have all matte black hardware (handles, corners, etc.) and matte black grille cloth, to match the existing face on the Peavey which I'll re-use. The back will be solid, but I plan to add 2 angled ports on each side for sound distribution ... something like BOSE does with their sound systems. The guts are a 100-watt all-tube system, with the 2 x 12" speakers I put in it last year.
If I can get someone do the "TF" plates in a smokey chrome color, that would be my first choice, but a brushed aluminum or steel will also do fine. They have to be fairly good sized plates though ... at least 3" x 3" or more. My workshop has no heat, so it'll be at least 8 weeks before it's warm enough to start this. Only in Canada, eh?