I'm not much of a fan of sd's or pacesetters. Had them both. It was tough to keep the pacesetters from leaking at the y-pipe. And I kept tearing flexes with sd's. I ended up welding in 2 flexes to keep that from happening.

Personally, I'm a big fan of togs. They seem to be pretty maintenance free. There also used to be a header comapny called S&S. They made great headers, but I haven't seen a set up for sale for years.