Most bang for the buck when overcoming DR

[Pyrowarlock]

So there's a whole ton of DR/whatevers out there, besides magic what goes the furthest? Materials are cheaper but usually you can overcome the same DR silver would with a chaotic weapon or cold iron with Lawful or Good weapons so which usually is better to have?

[Kittenological]

Clustered Shots feat from Ultimate Combat allows you to calculate the total damage from a full attack before applying DR.

[Altus Lucrim]

Martial Artist Monk, Barring that I like to get my weapons up to a plus 5 and have it count as all of the above.

[Azaelas Fayth]

Also I don't know if Pathfinder has it updated but there was a spell that could grant weapons/ammo the ability to by-pass 1 type of DR per casting.

[KainPen]

+5 weapon take care of just about all your DR needs. alot of creatures actual have Dr silver and good or cold iron and good. meaning the weapons needs to be both those ability, or be +3 and holy. or you can just go strait +5 and you don't have to worry about aligned weapons giving you negative levels.