I would suggest the following:
1.) Buckeye Burl and Gabon Ebony
2.) Curly Koa and Osage Orange
3.) Easter Red Cedar and Holley
Since you're making a matched set for yourself, spare no expense. Check out these wood species and whatever you decide, find some really special pieces. Build them to last a few generations.
For the pot call I would recommend glass over glass or crystal over glass. I use copper, aluminum, slatek, glass, crystal and slate and glass over glass is my all time favorite. Which ever you choose, i would say use glass as your sound board. For the striker, be sure to mend in the second species of wood that you use in your box calls to make them match.
Then post the pictures!
"Instruments of Mass Destruction"