I have had good experience with the Bosch Platinums #4212. I bought my SC and it had new plugs and wires on it. They didn't tell me what kind of plugs it was just "new platinum plugs and spark plug wires". I took it to the track, street raced it alot, and drove it to St. Louis, Carlisle, Columbus, Milan, etc.. All over. I put 22,000 miles on my SC most of which were highway but I'd say 15% were racing. Never ever EVER once hesitated or surged on me. So I can't say they are the best plug I've seen, but for $1.99 they aren't bad.
When taking my heads off to go to the machine shop I almost **** a brick when I pulled out 6 Bosch Platinums. They weren't even burnt up or white or anything but I trashed them and the wires. No sense in using old ignition stuff when rebuilding an engine. Other than the coil pack and DIS which are expensive and aren't bad.