I really wish I had seen / tried this bike when I made my purchase last August. Like the OP, I got a great deal on a 2009 Gary Fisher Zebrano since the 2010s were coming out. While I really like my Zebrano, I'd love to shed a few lbs off the overall weight.
I did try the 7.3 at the LBS, and decided against it.
Thanks for sharing this info, Matt. It is really helpful, and perhaps we'll bump into each other on the Chicagoland trails.