If they have an Abec rating, they are not for skateboarding(usually).
I would go with Bones Bearings, as in the Name Brand 'Bones'.
They manufacture THE best skateboard bearing out there, Bones Swiss Ceramics. But perfection like this doesn't come cheap. Its over $100, just for the bearings.
They also manufacture Bones Reds, which is cheap, and really good too, but not as good as Bones Swiss. Its usually less than $20
There's also Bones Swiss Precision, that's really good too, but its $60+.