You might want to check out Jim Meloche's Red Pine accordion on meloche.net. I don't know if it's the same as the one you're looking at, but it definitely has a different look than the Red Pine box on Marc's website.
Cocobolo, that's one heavy wood! very pretty though. I gotta admit, I'd never get one made of it cause it is very heavy.
Get yourself an Acadian while they're still around! That brand is my favorite so far. The tuning is spectacular. It's all in how he scrapes them reeds, sounds sweet to me. The compression is the best I've found so far too.
Your original guess of Tulipwood is correct. I just spoke with Marc. He said that in this picture, the wood has darkened over the years, and that it's lighter brand new. Best of luck with your new box. Scott