I used Conan for a grittier D&D game and it was awesome. A Game of Thrones and Thieves' World both look very promising in this regard as well. However, I'm thinking of using Star Wars d20 for a fantasy game:
The next D&D or d20 game I run will use VP/WP regardless. In my next fantasy game, I wanna do:
VP/WP
Armor as DR
Defense scores
Maybe Parry (slows things down a lot but is more fair in a gritty setting)
Skill-based Magic System like The Force
Parry mechanics are used in Conan. Everybody gets to try and Parry one attack per round, IIRC, and you must match or beat the attacker's roll that would otherwise hit you. So everybody has a Parry score. The trick of course, is which attack do you parry? The first henchman to hit you with a short sword or do you wait and see if the big bad evil guy gets a critical hit on you with his greatsword?
As to the magic system question, well, yes. I guess everyone would be considered a sorcerer but called wizards, although the term "sorcerer" could be reapplied to a PrC or some other class (like the D&D equivalent of a Force Adept, maybe?).
Ideas:
Wizard/Mage = Jedi Consular
Battle Mage/War Wizard = Jedi Guardian
Sorcerer/Witch = Force Adept
Priests/Clerics are priests with no magical powers of their own (see Priest PrC in Hero's Guide). This does not prevent them from becoming wizards, or the possibility that their god may grant them access to feats which give them a limited spell selection, maybe... Either that, or the reverse is true, and access to magic only comes from the gods, thereby strictly limiting wizards to the priesthood and severely limiting their spell selection based on their god's portfolio/domains (hatred, fire, war, tyranny, evil,, etc., translating to spells with evil descriptor, fire descriptor, mind-affecting descriptor, etc.)...
Each school of magic would be a feat. Magic Sensitive would be a feat, but free to wizards if they start as such at 1st level. What are there? Eight or Nine schools of magic? Universal would be a freebie at 1st level, and one more school of their choice (their "specialty"). There should be some kind of test at 7th level to rise from apprentice to master (jedi knight equivalent), with archmage being a PrC (like FR).
With priests as wizards, the lightsaber can be swapped out for their god's favored weapon, masterwork quality (+1 to attack rolls), capable of being imbued with divine essence (magic). For traditional wizards, it could be their staff (ala Gandalf and Saruman in LotR), capable of storing spells or other effects (such as a defense bonus), or for battle mages it could be a sword, axe, spear, etc. of similar power to wizards, but obviously more useful in combat than a staff.