The brand is QA1. They are a universal coilover used on streetrods. I think I used one of the lightest springs they offered since I still have some torsions left.
The ride is a little stiff, but that was what I was looking for. It isn't bone jarring harsh, but it is stiff.
As for the roads here... the highways are usually excellent, but the local roads aren't anything to brag about. Some serious wheel bending potholes.
http://www.qa1.net/