If you're looking for a cheap and filling sushi lunch you can't go wrong with Lola. Bentos start at around $8 and have all the standards you'd expect... Sushi, sashimi, bulgogi, etc.
As an added bonus, they also have Korean food such as BiBimBap.
They might not look like much, and their sushi wraps might not always be perfect, but this place is packed with good food and value.