I suggest measuring everything on columbus tubes. I haven't had any that were bowed, but I had some spirit tubes where the seat tube wasn't properly drawn. I guess measuring the seat tube is always a good idea that most builders skip.

When I worked at Trek, I wasn't particularly happy with Reynolds, because their tubes were never the same OD. With the fixtures we used at the time, having a tube that was too small could be a real pain. And sometimes they were too big to fit in the lugs. Seems to me that newer tubes are better, but my old prejudices mean that I don't use Reynolds unless I have to. And their new prices are a little out of hand.