I am looking into getting a SRI for my 02 OZ Rally, it' an AT. I have been looking and have found the Injen SRI for about $190 shipped and the RRM SRI for about $165-170 shipped. I was wondering if either one of these is better than the other, also if there is a better brand than the two I am looking at. Are these pretty good prices or could I expect lower if I look harder. Thanks.