I've heard such mixed reviews of tubular that I'm not quite sure if I want too or not. I do know I don't want to be more likely to get flats, which is the big thing I've read about with tubular. And I don't like to run really high psi(I run ~70psi now on 700x25c) or have to carry a spare tire and pump, and it would defeat the purpose of cutting weight if I went to a set-up that required me to carry more stuff on my bike in case of a more likely flat. And perhaps be more expensive? I don't have all That much to spend on the build. I will look into it more now that you mention it, though. I don't know terribly much about tubular and should rightfully read up before making any decisions.
On the other hand, this is going to be my nicer weather/longer ride bike, not my daily beater commuter, so the flat thing wouldn't be as big of an issue anyway. I'd mostly be riding bike paths and limited street/side walk. And if I did get a flat on a random leisure ride, it would suck since I'm just out to enjoy myself, but it's not like it would ruin my day and inconvenience me terribly. And I've read that tubulars ride better, which is an aspect I'd like in this bike... Well, now I've got a Lot of reading to do before I can go to sleep.
Thanks for the stem and derailleur, btw! That stem should clean up nicely and now I've got the full 600 tri-color shifter/derailleur/crank-set group!