Pantera. Nothing wrong with the classics.
Well depending on where you live, I would consider visiting some of the local water holes to find the up and coming. I got my start in the business hanging out at the clubs in LA, Hollywood, and San Francisco. I witnessed the beginnings of some great new talent back in the day. You can find them everywhere, just google your area for local gigs, I am sure you will find lots of up and comers.
That depends what genre of metal your into.....