The G-ones are ridiculously fast. They make [made] a 'sand racing' tire that is only moderately heavier than a standard training road tire. It seems they've superseded those old models, but they still make a 29x2.35 with no puncture protection. That's okay, because the sealant will do the job at those low pressures, anyway.
If you've got money to blow/aren't concerned with potential flat damage (honestly, I'm not really, anymore. I've realized that anything that WOULD HAVE caused me a flat usually wouldn't have been prevented by a burlier tire, anyway), Rene Herse (Jan Heine) gets Panaracer to make him an extra-light 29x2.2 that comes in at a ridiculous 490ish grams. His regular tires in that size punch in at just a bit less than the G-ones, and a premium price. I will say: the ride quality is beyond your expectations; I wanted to hate his tires when I tried them out, but they are well made, and no more damage prone than other lightweight stuff, in my experience.