Personally, as the racer (NOT ricer) that I am. I've seen both in action and both raced against each other. My best friend had the RB20 swap in his 240, his new white 240, since his older '92 just got t-boned recently. Sad story..anywayyy. I think the SR is WAYYYY too overdone, especially in my city. Every 240 here with a swap done is SR, 'cept my friends. My other friend is doing the KA-T, while I will be doing the RB25 (woo HOO). I just can't wait to start drifting with it and scratching while being pushed back by that turbo. I'm going to have an orgasm, I swear