Will the Roubaix take fenders and a rack? If not, you'll just need to make sure you're okay with a backpack/messenger bag and race blade fenders for your commute. I'm sure it would be a great club ride bike. If you do want to mount a rack and fenders, there are fast bikes that will allow you to do this if the Roubaix does not.

As others have said... take it for a test ride and compare against other similar bikes. I'm not one to talk anybody out of buying a nice and expensive bicycle... I've owned a few and wish I could afford more. If you really like the bike you'll likely keep it for many years to come, which will eventually make the original price seem pretty insignificant. Bicycles, even expensive ones, are pretty modest purchases compared to what many people spend on things like cars, boats, and motorcycles. And if you frequently use a bicycle you purchase, in my opinion it will be some of the best money you ever spend thanks to the mental and physical health benefits. Sure you can reap these benefits on less expensive bikes as well, but nice equipment can make it all the more enjoyable. It just depends on what you like. I know people who just love to ride and couldn't care less about the bike. Others... myself included... love the bicycles themselves as much as riding them.

Sean