Empirate
First Post
Could you just go back to 3e's version of DR*? Something like DR 20/+3. This doesn't mess around with the DR, but it does make the PCs choose how they want their magic attacks. In 3.5 I've always seen players keep a +1 weapon and add as much magic as possible to the thing. It becomes a +1 flaming, shocking, icyburst, holy, sundering mace. If you change DR to require a more powerful enchantment (+3/+4+/5) then you can seriously bump up some of the DR capabilities.
* NOTE: I never played 3.0 so I don't know if I have it right, if this isn't the 3e method of handling DR I think it still works.
Actually, people did the same in 3.0. Their party's Cleric just kept a few Greater Magic Weapons ready each morning.
Straight enhancement bonuses are too easy to emulate, and too expensive to buy, compared to spiffy weapon enchantments like Holy, Magebane, Collision, Valorous, Splitting...