Originally Posted by 2manybikes
Lots of good information here. Also a lugged frame is a little heavier than a welded frame. If you are not going for a super light bike I would not consider this a big deal.
For a classic look and a frame than can take a little more abuse I would go with lugs. In fact If I were buying a custom bike I would want something fancy about the lugs.
A lugged bike is not necessarily heavier. Our brazer up here at Serotta weighed all of the lugs and tubes of a Csi (our lugged steel - available in any shape or size) against all of the tubes of the Colorado III (our Tig welded steel frame). The Csi was marginally lighter. Lugs themselves are very light, and the tubing is drawn differently for the two models.
Tubes are replaceable in either method of joining. Lugs do look nice. Built by a good builder, strength will not be an issue. David Kirk builds some beautiful fillet brazed frames.
http://www.kirkframeworks.com/index.htm