I run a 150mm KS LEV in my alloy Sight, it shouldn't be any different for a carbon. The only thing you need to be aware of is frame size, I have a medium frame and a 150mm dropper can only go so far into the frame before it bottoms out in the seat tube. Which means when the dropper is up at max height it the saddle might be to high for yours legs, you can run shorter cranks but it might not be enough. I had to go down to 170mm cranks to feel comfortable with a 150mm dropper.
Medium or small frame = 125mm dropper.
Large frame = 150mm dropper.
Edit, If you happen to get a KS dropper make sure you buy a southpaw lever for it as well, it's far better than the standard KS lever.