I have a Specialized Sirrus and have been commuting for about 4 years on it. I would totally recommend it to any other commuter - this is for anyone else reading the thread as I see you have bought your bike.

It is really suited for roads but can handle a certain amount of rough stuff - I often ride fully loaded with front and rear panniers.

Good luck with the Arriba and with commuting by bike - it is well worth the effort :-)