If you do meet up, I'd also be interested in coming along - I've been umming and arring for ages about which exhausts to get. Although I love the sound of Xpowers, I'm not sure if I could live with them long term for exactly the reasons Jamie mentions in the first post (not that you can find Xpowers anyway!). I've heard the different exhausts at meets, but it's hard to know what they would sound like on a "normal" journey. I still have OEM exhausts on mine, so would be interesting to compare those against Zeros.