To start off... Sushi can be dicey on a Monday - by Monday, the fish market's been closed for 2 days. Yes, the miracle of modern refrigeration can do wonders in keeping fish fresh, but why pay for merely good (and refrigerated) fish when you can go on a Tuesday-Friday night and have EXCELLENT, fresh sushi & Sashimi?
That having been said, sushi recs in Santa Monica (& environs) (& I don't know if any of these is open for Mondays):
1. The Hump (at the SM airport)
2. Mori Sushi (on Pico)
3. Kiriko (on Sawtelle)
4. Yuzando (on Sawtelle)
5. Tengu (near the pier)
In my opinion, you should skip: