Not all carbon is equal, Ive seen carbon parts for sale that are obviously wet layup (not prepreg) which can be ok but not usually an indication of high quality. There are two reasons to get carbon parts, form or function. If its form, may as well get carbon stickers IMHO, if it's function then you either want improved strength, less weight or both. Unless you have deep pockets the stock plastics are superior to average carbon facsimiles, you have to spend a lot of money to get a weight advantage. Where you really get the benefit is in replacing metal parts with property engineered carbon but for most people a lithium battery and replacing the stock pipes is way better bang for buck. There is a reason the Superleggera costs so much.