Ai Sushi is really a great place to get higher end quality donburi for take-out. I have tried both the Deluxe Kaisendon and Deluxe Chirashidon. Both the variety and the portion of sashimi are quite generous for the donburi. The deluxe donburi may be a bit pricier but does worth the extra considered it included some premium grade sashimi. I have ordered few times and both the presentation and taste are consistently great.
Also, their house rolls are half size roll (4 pieces in each order). It is a great way to enjoy multiple rolls at the same for smaller order. I do recommend both their Honey Mustard Roll and Ai Roll.
I usually order on weekdays and call ahead at least 20 to 30 minutes before pickup to avoid wait time.