I ordered some Specialized TT tubulars the other day because, apart from the Conti, I don’t have any spares around. I got a 22mm S-Works Turbo Mountain (245g, for the front) and, if/when I need to replace the rear, it’ll be with a 26mm S-Works Turbo TT (260g).
EDIT
First outing for the machine is at Monsal Head on Sunday. The weather forecast is now giving rain, and I've noticed some small nicks in the sidewall of the rear tubular that's on the PX wheels (as well as experiencing wheelspin because it's got zero tread), so I'm going to swap the fat tub onto the back.