Honestly I don't know about the DC headers. But in the grand scheme of things, they're only headers. A couple of feet of tubing for your engine to fart through. How much of difference could possibly exist between the 'best" and the "worst"? On top of that how do you judge? Raw HP gain only? Quality of construction? Ease of customer service? I trust SoS, I have always had great dealings with them and they have a product that appealsto me, so in this case, they get my money.
Since I have a '93 with stuffy old intake manifolds, I'm upgrading. I think the '97 and up cars have headers from the factory don't they?