I would agree with GregP in that the NSK Platinums are pretty darned good bearings, but I like their Gold bearings a little better, though they are both excellent but pricey.
The YYF Gold CT are my all time favorite bearing right now. I can actually feel when they are in my YoYo. Not all the time, but they have a feel to them that is hard to describe, and hard to not notice.
Call me crazy, but it’s true.
The Terrapin X-Delta’s are awesome bearings as well. You can’t go wrong with their Ceramics.
I have also had tremendous success with their “Dry Play” bearing treatment.
This is a great time for bearings… There are several great choices to pick from compared to just a few short years ago.