Cheap Sushi on the Westside
I agree with the Sushi Tenn lunch recommendation. The $18 chirashi bowl with soup and salad is a terrific value with very decent quality fish. However, to the original poster, just beware that if you start ordering a la carte at Sushi Tenn, the "cheap" part goes out the window.
If about $25-$30 to feel full (without alcohol), there are two I enjoy:
Sushi Masu (on Westwood, slightly south of Santa Monica)
Go on a weekday night. The chef is friendly, fish is fresh. The main chef, however, is significantly better than his assistant in draping/constructing the sushi. Sushi is simple (not a lot of crazy rolls). But if you are into rolls, the dragon roll has a really nice flavor. Have excellent non-sushi items as well. Parking is fairly easy. If you do go on a weekend night, the service will be slow.
Sushi Karen (On Washington blvd, west of Downtown Culver City)
Has some less standard stuff (lemon & salt red snapper, "amber jack," yellowtail belly). Also, even on weekend nights isn't very busy. Some excellent pieces of fish. Service is attentive.
Hide Sushi - Recently, I haven't been that impressed considering the wait; even on a weekday you can wait up to an hour during peak times to get seated. Parking on weekends is somewhat a hastle. Offers basic sushi nothing really memorable(maybe I just don't know what to order!). Also, is not much cheaper from the ones described above (more like $20 a person).
Hope that helps!
If you want to do lunch and are a little brave, the Sushi the Students prepare at the California Sushi Academy on Centinella is pretty darn tasty. It's one of the FEW place I've returned to more than once this past year because it was such a great deal and we got some really yummy things... :)
Hide Sushi on Sawtelle is very popular.
I personally enjoy California Sushi Roll on Wilshire and Granville (near Barrington).
A new sushi place is just opening on Wilshire just East of Centinela called Hara Sushi and they have a coupon in the mailer you get periodically for money off.
EN Sushi (Barrington & Santa Monica Blvd.) is a good deal at lunch.