If you get the Tufos, treat them with their sealant, which should prevent most puncture flats. They are not repairable otherwise, since they are not traditional sewups. I tried the Tufo tubular clinchers and didn't like them. They were extremely difficult to mount and won't fit properly on all clincher rims.

If you're going to stay with clincher rims, then I'd recommend just using traditional clinchers with separate tubes.