Since you live in Korea, you're a lot closer to the manufacturers for the Chinese/Taiwanese carbon rims. You may be able to source locally for a better price than what we can get here (after paying shipping and marketing costs).

SOUL bikes also makes decent wheelsets in Singapore.

As to worthwhile... that depends on what your money is worth to you. In terms of true performance, you're shaving seconds off an hour-long ride. Getting up to speed might feel a little better.