The posts above are right on - my Volpe weighs 25lbs, or did when I brought it home. I had a T800 for awhile and it was about 28lbs. My older Trek 520 was 27lbs stock and is about 40 with Arkels and HD Jandd racks. Interestingly, front and rear racks will weigh from 3-5 lbs, and four empty panniers between 7-10lbs. So a full set of racks/pans can weigh anywhere from 10 to 15lbs - a pretty significant weight variation of 5lbs, depending on which brand/style you get.

With all the other stuff we often add - handlebar bag, lights, tools - you can see there is little need to be overly concerned about the bike weight UNLESS you intend to travel light and fast. Then it would pay to get a reasonably lightweight bike and spend a bit more for the lighter gear to go with it. Pack minimally, and as someone mentioned you might trim the overall weight by 10-15 lbs. For short tours it might be the way to go - on a longer trip there is no sense in worrying about a few pounds since you need some amenities and enough gear for changing conditions.