i wouldnt even buy an SRI after reading an article Cobb put out about CAI's. Basically if you run a SRI your intake is going to be sucking in air thats up to 100 degree's hotter then a CAI. sure it will make power before the car is warmed up, but once some heat is built up under the hood you got nothing but a nifty sound.
A cai will suck air thats near ambient tempature 70degrees vs 160... which would you rather have?