I didn't search the thread for it, but as the last few posts are about putting tubes together... why not consider something fillet brazed?

Fillet brazing is kindof like building the lugs in place. A small piece of metal is heated and used to join the tubes. Many fillet brazes are filed before painting. It makes for a sexy, durable finish.

I just got my gf a half lugged (bb, stays), half fillet brazed Jeff Lyon frame. It should make for a very nice, long lived ride.

Here's an interesting article on fillet brazed, lugged and tig manufacture: http://www.anvilbikes.com/story.php?news_ID=19&catID=3