MIne is most probably a bearing.
I finally got a thermometer (wasn't paying attention and got one from china.. I mean shipped from china) and checked the temperature on the axle after driving about 1 hr.
Axles were same at about 96 degrees. However when I checked temperature at the boot, "bad" side was about 12 degrees hotter (116 deg vs 104 deg)
I also went to an local porsche shop (non dealer ) and owner was kind enough to drive around with me.. and pointed out the bearing too..
Next weekend will be a DIY wheel bearing weekend.. hopefully I can do it
On the side note, I changed my engine mount, spark plugs, fuel filter, oil and belt this weekend.. car feels great! no more vibration! idle went up from 600RPM to 800RPM and feels more steady! and I feel proud! it's my first time getting under the car!
Thanks everyone for great advice and support! Thanks to Pedro for excellent DIY section!
And to everyone who wants to DIY it.. if I can do it .. anyone can do it! Don't be afraid
I'm a software engineer, I never got my hands dirty and never held a wrench before.. I didn't even knew the difference between wrench and socket.. and I did it!
Thanks a lot!
Sasha