SRT4 if your looking to keep the warranty, and the motors are beef deluxe, with my own eyes i watched an SRT4 motor in a 1st gen neon put down 529 whp on a factory bottom end, i think for the buck, and if you are going to be modding and are conscious of your warranty, the SRT4 is your huckleberry, the WRX is a sweet car, and definitely has a nicer looking exterior and nicer interior....but if your looking to change parts back to stock, good luck, boxer motors are no joke to work on