Mine are making a racket too at 160k. My local (highly respected) indy shop just quoted me the following:

$467.50 labor (5.5hrs @ $85/hr)
$414 bearings (Timken @ $207 ea... really?)
$358 hubs ($179 ea)

I'm ok with the labor, but the parts quote is way high. They're ok with using parts that I supply so long as they're SKF, FAG or Timken. They will warrant the labor, but not parts that I supply; which is fair. They didn't want to bother trying to get the old race off the hubs when they pop them off. I told them for $358 they need to try for half an hour labor or so. They got the hint.

I'd normally tackle this myself, but I really can't spare the time with kids headed to college. I figure the hydraulic puller and plates and hardened threaded rod is about $200, so I'm looking at a net of about $270, which I'm ok with.

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12 E70 3.5i xDrive
03 E46 330i ZHP
01 E53 3.0i
98 E36 323is
12 Audi A4 Quattro
79 Triumph Spitfire
73 MGB