OP, what is your definition of "light," and is the ability to fold the buttstock your primary goal? The reason I ask is because no chassis will ever be as light as the lightest of the CF composite 1pc (non-folding) stocks. So, if lightness is the most important goal, you will probably have to sacrifice the folding stock option, unless there is a folding stock weighing less than 20 oz out there I'm not aware of. The lightest folding chassis I'm aware of will weigh in the neighborhood of 26-32 oz, whereas you can get non-folding stocks as light as 16-18 oz.
Also, keep in mind that CF barrels are mainly just for looks. They are lighter ONLY when compared to all steel barrels of the same diameter. A light #1 profile all steel barrel and even some #2 profile all steel barrels are lighter than any of the CF barrels because they start with a steel core blank that is around #1 profile in the center portion of the blank and then add CF wrap around it. As light as CF is, you are still adding material to the same basic diameter blank as you can get without CF, which anyway you slice it, adds weight. It does add stiffness to a light steel contour, which may or may not improve grouping ability. I have a few CF wrapped barrels. I've not seen any better accuracy out of them than a quality skinny steel barrel gives me. Contrary to hype, it does not make your barrel cool faster either. Bottom line, it's mainly a cosmetic thing. I love the look of CF as much as anyone, but on barrels, the benefits are way overstated. The only thing you can really count on CF wrap doing is look cool and lighten your wallet.