I've found the 3rd Edition of the WHFRP game to be the best fantasy ruleset on the market for roleplaying within Robert E. Howard's Hyboria world setting for his famed protagonist, Conan the Barbarian. I'm currently working on what seems to be an easy conversion of Conan RPG (Second Edition) d20 from Mongoose Publishing into the WHFRP 3rd Edition ruleset. The story-oriented rules, the fantasy career system (Conan himself participated in at least 4 WHFRP Career equivalents), the power pool-based magic system, rules for Insanity, Corruption, and Mutation, and the critical hit model of combat all seem very in line with dark fantasy, "sword-n-sorcery" roleplay of any kind. And especially Hyboria.
Has anyone else on this forum tried Conan-type gaming using the WHFRP 3rd Ed. ruleset? How are you finding the match?