Lisa did a great job on his top. I assume you are very experienced with woodworking but, I'm going to offer some thoughts on your project anyhow. Wide boards, especially in exotic woods cost a premium. Smaller planks that you glue up are not only cheaper but more stable as well. Plywood is the most stable but that doesn't sound like it would satisfy you for this project. It wouldn't double as a cutting board.
Definitely frame the board for both stability and keeping objects from sliding off. If you are looking for a really elegant piece and you have the equipment, buy a thicker piece, 6/4" in thickness and 12" to 13" wide, depending on how big you really need it to be (you'll lose at least 1/2" in planing and joining) and resaw to get your two halves. Then, you can open the two boards like a book and get mirrored image of the grain (it's called book matched grain, if you don't have interesting grain character, its not worth it). A large diameter table saw and good hand saw would do it. It's good to have a planer but a hand plane will work. Just a lot of work.
I'm looking forward to seeing how it all comes out. You can also inlay or burn a cool image into the top. I get paid a lot of money for that kind of stuff. Really adds value to the work and wood burning isn't that hard to learn.
- Will (Dragonfly)