I agree with the previous posts - the three things to look for in a Road/Commuter bike are:
1. Ability to take racks
2. Ability to take 28 - 32 mm tires
3. Ability to put fenders on.
I ride a 1983 Trek 720 with Sun CR18 wheels and 28mm tires, a rear rack with trunk bag and fenders - which weighs in at 27 lbs. When I take off the rack and fenders and replace the wheels with a lighter set and 25mm tires the weight drops to 23 lbs and it is perfect for general road riding. I use it on club rides with the B or C group and most of my longer solo rides. I do take my Lemond for A rides, but that is more for the handling and the better performance on hills.