Condor Italia with 105 groupset and Continental Ultra Gatorskin tyres to keep (most of) the glass out.
Last year I commuted a 15 mile round trip and put in 3000 miles in the year, since then I've moved house and commute a 10 mile round trip (which isn't far enough!) and with other riding as well I'm set for about 2500 miles. I'm very comfortable on my roady and carry everything including the groceries on it in my Crumpler (Donny Frank).
My bike last year was a Marin flat bar hybrid and since I got on the Condor I haven't been able to get back on it, even at 30 MPH it feels slow and boring by comparison.