I play guitar, but I always like the sound of the clarinet, I was thinking of getting one. I don't play a regular Clarinet, but I do have a pocket clarinet made of Ebony and I love the sound. I always heard that the old Clarinets made of Ebony had the best sound, but some point in time they stop making them out of Ebony wood, now most of the use Grenadilla wood, some other exotic woods are used too (I can't think of them off hand.) Ebonite (Hard Resin), ABS Plastic are also used.
I found this site saying Grenadilla wood isn't the best, but his pick, Rosewood, has too many problems inherent with the wood.
buffet also makes "greenline" clarinets, which i think are a mixture of grenedilla and resin? not sure. i've only played plastic and grenedilla, and the quality difference ignoring materials (vito versus buffet) make my comparisons pretty useless as far as materials go :P