My vote is for the Coda. The Avanti is just like every other aluminum hybrid out there. I have one (alu hybrid) sitting in the basement right next to a new Coda. I originally looked at an alu hybrid and a Coda 3 years ago and made the mistake of buying the alu. The Coda is so much smoother.

The only time I'd recommend the Avanti over the Coda is if you have to store your bike outside and it's going to rain on it every day (bad idea with any bike, but hey, sometimes it has to be done). That's aluminum's only advantage-no rust.