How to choose between a race bike like a Madone and a classics bike like a Domane
I think you answered your own question when you stated "I don't race."  I know many in our club who enjoy the Roubaix.  I personally prefer riding my steel Soma ES over my carbon race bike for most things, including fast club rides.  Don't get me wrong, a twitchy race bike is great in a crit, but the other non-race bikes have had their design optimized for non-race road riding.  It is too easy to get up caught up in all the bike porn the industry pushes.  A solid, well sorted, well maintained, properly fitted road bike of any class and age can be a great riding tool.

In the end this is just all opinion, but I would be careful not to get caught up in the industry's push for "race" performance, which only serves a small minority of road riders.