What else? You surely have more requirements than ball-bearing pivots. What type of blade? Drop point, clip point, etc. Personally, I would start there. Pick the blade shape and size desired and start looking. Eliminate models and brands that do not meet your needs.
Take a close look at ergonomics too. Ball-bearing pivots and fancy blade shapes won't make any difference if the knife does not fit your hand.
As for avoiding Chinese production, you will be passing up a huge section of available products. Some of them are even decently made. It is your choice though. May I suggest that you at least look at Chinese offerings to help in your "knife education" and decision-making process.
FWIW, I have one ball-bearing knife on my wish list. LionSteel's TM1. Lock type, blade shape, handle material and ergonomics all played bigger roles in helping me choose the TM1 than the type of pivot. The fact that it is a bearing pivot makes things just a little nicer.
If I may ask, why is a ball-bearing pivot so important to you? Many people feel that pivot bearings are costly and make a knife impractical for field use or everyday carry.
Oh, btw, welcome to blade forums.