Sopporo is in my opinion, the best sushi in Scottsdale. The best time to hit it is during lunch or happy hour. It gets pretty packed in the evening, but during the day I say sit at the bar and have a Vegas Roll, my favorite item on the menu.
The prices are a little steep in the evening, but usually they have all day happy hour, and that's where it's at. The service is always good, I've never had a bad experience there.