havn't weighed my new bike yet, but I weighed my old setup one day before I went to work. 45lbs. Mountain bike (suspension forks), rack, panniers, laptop, clothes, towel, toiletries, tools, ulock and cable lock. I don't think i had my headlight at that time.
I'll have to set the new bike on the scale soon. I no longer carry the laptop every day, but I do have a headlight and heavy battery.