Wrong...
A b50 hacker is about halfway between a feigao and a neu. The c50 that arct1k listed is a very good motor. I have a quite a few, mainly L cans, and they are almost as powerful as a feigao xl, and run cooler. The c50 use a segmented magnet assy like a lehner, and the windings are very nicely organized in the can. Materials quality is very high on these motors. I would say that the c50 are comparable to a lehner. I think the neu design is ultimately better. That said I have routinely found hackeer c50 motors for sale used for around 100 bucks, making them a good bargain for a high quality motor.
Funny how the 10xl is already over $100, I just won an 11xl off ebay last week, for $119
Luck of the draw sometimes...