IMO, you are better off going by what people who have the motorcycle and ride like you ride, recommendations. Understand that you still want to see and touch them. In my experience I could not find anyone local carrying the PR2's, so, bit the bullet, went on some recommendations from the board and dove in. Have been the only tires on the bike since, actually running the B's now to see if I can't get anymore mileage out of them and not have the center wear down so much.
As for a tire selection in Socal, you've been to the best, Berts. Only other place that might have a decent stock is Chapparell in Riverside.