I don't stress too much about my main commuter's weight...it has racks, fenders, sprung Brooks and lighting...of course it isn't light. I didn't chose the lightest parts either. It can be a little annoying taking up and down stairs, but riding is smooth and it has nice easy gearing to compensate.
I use this with my wife for errands, fun and whatnot...the weight and bulk make it a pain to move, and it flexes a bit...but it rides nice and smooth with a sensible gear ratio.