i thought about it but then ended up just getting a whole used knuckle. they're a lot more axially strong that the suby ones.
the nissan bearing was about the price of the suby one, but then you need to get it pressed into your hub, and that's assuming your hub isn't toast from the previous bearing dying (mine was). as i remember the bearings, 2 seals, and $10 to have it pressed came to about $80, and a used low milage hub from norms was $60 shipped to my door. i went that route.
if you're going to be road racing or anything i would suggest them though, or if you're dead set on new bearings.