I don't think the noise I am experiencing is not brake pad related. I will be replacing the entire assembly, so no press fitting needed. Maybe my analysis is wrong, but I will post up if it fixes the issue or not.When you performed your "wheels spin freely" test, you removed all four front brake pads, right?
Very rarely do worn & noisy wheel bearings affect the "free-spinning" characteristic of a wheel hub unless the bearing is literally disintegrating.
If the bearing had enough internal friction (with no load on it) to obviously affect wheel drag when spun by hand, the bearing would be literally smoking after an hour on the freeway at 65 MPH.
I think it's unlikely that your front wheel bearing has gone bad at 57K miles unless it has somehow been subjected to extremely severe abuse.
If you didn't pull the pads the first time, I'd remove the wheel again, pull the pads, and repeat your "spins freely/listen for noise & roughness"" test before going through all the effort and expense of replacing the wheel bearing, which is not a trivial job on the FJ. You know that the wheel bearing is press-fitted into the steering knuckle, right?