Hey, I have a R400, too! And the R1000 wsd is my dream upgrade, too (one day...). My current bike is a caad3, so I have little doubt that a caad8 (or 9) will feel like silk to me. I love the "zip" of c'dale--even in my current ride--although I have little inclination to do distances longer than 50-60 miles. Just wanted to wish you luck in your purchase.