Any of the three will protect your bore. I have found the brass and aluminum rods to be too fragile for use over the long haul.
Two good rod companies:
J Dewey Manufacturing
Tetra Gun Prosmith
I own both and prefer the Dewey rods because of their much faster ball bearing movement and easier to grip handle. My buddy, who also has both, likes the Tetra Gun ones more.
YMMV,
Dave