For the money the Samyang lenses can't be beat. If a little breathing (not that bad) doesn't bother you and flare isn't an issue they are really on par with the best of the best and super inexpensive.
24mm f1.4 on APS-H "feels" like 18mm on super35, 35mm feels like 25mm, etc. So a 24m, 35, 50, 85 kit at f1.4 would cover things great.
Optically these lenses are more than up to the task, too.
He's buying a $10k camera and the first lens he seemed seriously interested in is $5200, the Samyangs are great if you're on a budget but clearly he's not.
They're comparable to the Canon L equivalents (well, the 35mm outperforms the 35mm L wide open and the others are not far behind) and, in my experience, they outperform the Cooke S4s and Zeiss Superspeeds as well in terms of sharpness and micro contrast wide open. Granted the mechanics and "look" are worse, but just because you CAN spend more money doesn't mean you need to, especially when the rest of a decent package (tripod, camera support, matte box, filters) can add up so fast. I know a lot of Scarlet users are using these lenses, and that's the same price range (though I'd much prefer the 1DC!).
That said, if money is no issue, the Canon cinema primes seem like the best things going; the selection is just very limited and the prices are high.