For street riding they are fine, for track/racing go OEM or a quality aftermarket. I need to replace the front ones on one of the race wheels, and went with Nachi (Japanese). SKF are another reliable quality aftermarket set.

SKF make both excellent and cheap bearings. They're definitely my go to for aftermarket. Like most things bearings have different grades. Most towns have bearing shops and you can just go there with the bearings or the numbers off the side and they can source them for you and offer you varying qualities.

I just remembered another I've used recently and are excellent. Worldwide bearings. I have them in my BST wheels. I've never seen steel bearings with so little drag and so smooth before. They also make ceramic bearings.

That's what I'm getting soon-ish. Ceramic.