there's quite a few good ones...yep, like Opeth. But i havent seen very many of those around.
So far you're the only other person I've seen on this board who's a nut for Zappa, and that's sad.
I don't have a favorite. Sorry to be boring, but I dig oldschool, powermetal (in your face style) prog-metal, thrash and some technical metal.
Bryant