MoogleEmpMog
First Post
Spelljammer. It's the answer to every setting search.
But, since it's not available for 3.x D&D and doesn't fit any of your criteria, I'll skip it.
I like the current edition of Dragonlance best of the still-supported-TSR-settings crowd. Sovreign Press has done a wonderful job with the line, and the production values are top notch. Dragonlance never seemed all that high-magic to me, or at least it's somewhat rare magic. I recommend the War of the Lance period over Age of Mortals, but that's just me.
Privateer Press's Iron Kingdoms are a gorgeous rareish-magic setting if you're looking for something new and different. There aren't a lot of mages and the culture is fairly low-magic. On the flip side, the CRs of some monsters go up to the 30s, with NPCs to match, so if by high-magic you mean high-level, it would be a bad choice. Award-winning adventure series and all, though you'll be hard-pressed to actually find it (the Witchfire trilogy) in stores until the hardcover is released.
Mongoose's OGL Conan is a wonderful, wonderful book. It's not compatible with core D&D, though.

But, since it's not available for 3.x D&D and doesn't fit any of your criteria, I'll skip it.
I like the current edition of Dragonlance best of the still-supported-TSR-settings crowd. Sovreign Press has done a wonderful job with the line, and the production values are top notch. Dragonlance never seemed all that high-magic to me, or at least it's somewhat rare magic. I recommend the War of the Lance period over Age of Mortals, but that's just me.
Privateer Press's Iron Kingdoms are a gorgeous rareish-magic setting if you're looking for something new and different. There aren't a lot of mages and the culture is fairly low-magic. On the flip side, the CRs of some monsters go up to the 30s, with NPCs to match, so if by high-magic you mean high-level, it would be a bad choice. Award-winning adventure series and all, though you'll be hard-pressed to actually find it (the Witchfire trilogy) in stores until the hardcover is released.
Mongoose's OGL Conan is a wonderful, wonderful book. It's not compatible with core D&D, though.