If you don't race, you don't need tubulars. Stick with your clinchers and you'll be fine.

UST tubeless technology hasn't hit the cross scene yet, although Tufo makes a tubular clincher (basically a tubular with a bead so it fits on a clincher rim). I just got some and it was hecka-hard to mount. I couldn't do it by myself and even me & a big guy had a hard time doing it together. It's so tight because it's designed to seal the rim. In my opinion, this would be super-hard to change a flat.

Did I mention you should just stick with your clinchers?