Timken, SKF, FAG, are all good as are MOOG and Precision (but I have heard Precision has slipped a bit in quality). Beware of "house brands" - measure the bearing and hub diameters carefully. The popular way to cheap out on these is to use a smaller bearing and make the hub and/or housing castings thicker.
And as to AC Delco - look closely, they manufacture nothing, it's almost all aftermarket suppliers