No offense taken but why do you feel that way? Dynomax makes a quality product that sounds and performs great plus lasts a long time. The greddy exhaust is bling-bling but it costs over $500. According to what I've read, Mugen found that replacing the B-pipe does little or nothing performancewise on a basically stock engine and most power gains came from replacing the restrictive stock muffler. If that is the case I doubt that the greddy or any other exhaust would make any more power than the Dynomax. If you want bling-bling stainless then by all means get the greddy. If you want cheap performance get the dynomax. If I had tons of cash to blow I prolly would have gotten the greddy myself or that other one with the dual tips (HKS?), but I don't and I wasn't spending $500+ on an exhaust for a $260 car.

Summit has the dynomax kit in stock ready to ship. The part number is WLK-17452. This link might take you to it. See if this works.