If I ever run another group of PC's through a Sword & Sorcery campaign I think I'm going to go with Chaosium's Elric!. I'm sure I would modify it with mechanics from the BRP Gold Book, mostly with defining the magic system, but for the rest of it; gritty combat, incredible stunts, fearless dimension hopping, etc., I think the rules set gets the job done.
I could recycle my World of Xoth campaign material for any Heavy Metal minded troop of PC's who want to turn their sword swinging savagery up to eleven. The flexibility of Chaosium's mechanics makes it possible to craft your own brand of Sword & Sorcery. You really can conjure any world of post-apocalyptic or pre-cataclysmic savagery and super science your imagination can devise.