OK YAK, Im an uncertified expert in wheel bearings. Ive swapped 4 sets out in 60k miles, off the front. Thus far my current OEM bearings have been installedfor 35k without a hitch. Ive gotten bearings from Autozone/ Aftermarket ECS... NOTHING has been proven more effective then my OEMs.
Get them from 1stvwparts.com or parts.com for a "discount" Do NOT buy them from ECS.