I would start with what you know. If you are seeing a wobble in the axle that's probably at least part of the problem. What kind of noise are you getting (I didn't see a description of the noise just that there was one)? It could also be the carrier bearing if you are getting a bearing noise. I had a bad one just after I bought by '09 and I would have sworn it was the wheel bearing from the sound I was getting but everything was tight. It had the same change in noise when turning as well. If you are getting a bearing noise the carrier bearing is probably to blame if all the other bearings are tight.
2009 Ford Focus Sedan SE--Amber Gold Metallic--FS Cool-flo intake, 17" Black Kazera Rims with Potenza S-04PP, Custom 2.5" Exhaust.