Tom - Specialized Diverge...it's FUN!!! It has some...different...characteristics than I'm used to, some of which may be that elastomer suspension in the back. It doesn't ride like steel, but it's different, not worse. Overall, I like the ride of another similar steel bike a bit better...but the Diverge is more fun, and notably quicker.
I don't remember the model name...the CF one that came with mostly 105.
As a side note...I'm a fan of these tires too!