Super Rupair in Boulder, CO claims to be the largest indepentent Subaru shop in the U.S.A. if not the world. I bought a used EJ22 from them this year, and saw the shop.
Here in Colorado, there are Subaru's everywhere. I think Colorado leads the U.S.A. in Subaru sales, but don't quote me on that. I live in metro Denver, and I started counting Subaru's on my way to work each day, I never counted fewer than 20 ru's on my 10 mile drive into downtown Denver daily.
Used parts, and cars are plentiful here. People here like to have 4WD and reliablilty, and Subaru fits the bill perfectly.
I have lived in Colorado all my life, and I have yet to actually own a Subaru vehicle. I just transplanted an EJ22 into my VW Vanagon this summer, so I am half way there. My next car purchase will likely be a Subaru Legacy wagon or Outback wagon.
Cheers!
Andy