A good option for Light Disc Rims are ENVE 29XC Clincher Rims - they are approved for 23mm Clincher Use and are only 385 grams each - a definite weight savings over 45 Clinchers or 3.4's as there is no brake track.
Not that Aero but nice and wide - they should handle great.
Combine them with some Tune Mig/Mag and you have an easily sub 1,400 gram wheelset.
i dont think they are designed for 120psi, more like 65psi.
i would prefer cable vs hydro for the easier setup, but there is no doubt that hydro has better modulation and power. though cable disc give more power than rim brakes.
lets talk about aero. so disc's are not aero, says who? but then neither were firecrest fatty/blunt wheels in the past, it was all about V shape. whats aero or not changes as much as the USADA says which types of foods are good for you. one day carrots are good for you the next they will kill you slowly.lol i dont think a dude is going to be faster than me on the bike because i have disc and he has rim brakes... do we know how much drag a rim brake has on the bike; in front of the fork and seat stays? we have companies hiding the calipers behind the fork, integrating them into the fork, brake caliper below/behind the Bottom Bracket, etc. its a lot of heavy marketing and in all of that there is some truth (minuscule). you can believe what you want to believe, ive got nothing against that, just dont try to bash disc on road bikes, its not what this threads about.
Carbon rims delaminate when braking hard and long with rim brakes- fact
Carbon rims can be made lighter if used for disc vs. rim braking - fact
disc brakes have better power and modulation, allowing for more accurate and precise late braking - fact
disc brakes are beter in ALL weather conditions - fact
disc brake are less aero than a conventional rim brake set up - hmm, prove it!!! lets see disc drag vs. rim brake drag
i asked the question, do you guys think this will happen in mass in the next year or so - its turned out to be a "we dont need it, bla bla bla, im the best descender in the world, etc..." thread. state your opinion and be cool about it; its not for you, then its not for you - hopefully you dont have to eat your words later.
Dammit - post pics of the full bike with the enve disc forks