Paul Chen. Enough said.
The entire Hanwei line has a terrible reputation for quality control. So bad that their entire practical series is banned from a number (perhaps a majority) of dojos.
As for knivesRUs, I really have no experience with them. However, I refuse to do business as they sell Stainless Steel Swords
without a warning. Stainless is dangerously brittle and should not be used for a blade over 6 inches.