A chipped ECU is great depending on what progam you get. My best friend is selling his JDM small P30 ECU that has a 5500rpm Vtec X-over and an 8600rpm rev limit on it. Im not sure for how much but i think he wants $300-400 for it. It made a world of difference over the stock ECU, but then again he has lots of mods done to the engine so he could utilize the program that was on the ECU.