wow you guys dish out a lot of cash for performance parts, i usually try to find them deals and if i'm lucky the hommie discounts. DC sports makes good headers for the price you pay for which is good quality with durability and its carb legal [ most of them ]. of course there are better headers with more raw power but they are pretty damn expensive. and almost every top import manufacturer produces their own type of header. Greddy/Trust, Mugen, Spoon, Jun, DC, Skunk2, HKS, Comptech, etc....
IMO i dont trust Tsudo products, i get an impression of cheap ebay/megan stuff, but thats just me. Since you want a 2.5 why not the OEM JDM ITR 4-1 headers? can't beat the quality of OEM and might even be cheaper than aftermarket ones. watever header you decide to get, i suggest you getting stainless steel since its ALOT stronger than ceramic ones.