I've been happy with the Chinese spindle but chose not to scrimp on the VFD and went with Hitachi. It not only has larger fans and capacitors but emits far, far less electrical noise than the Chinese VFD's. And, the 2.2kW Hitachi VFD is rated to handle my 3kW spindle so that was another consideration. The final consideration is that I can call Drives Warehouse in Dallas and talk to a real person who knows the Hitachi VFD like the back of his hand.
David