The best Sushi in San Francisco is across the Golden Gate bridge in Sausalito, an easy drive, at place named Sushi Ran. Your actor friends in LA typically make it their plan to go their when in town.
In San Francisco, I have heard Sebo is good in Hayes Valley - supposedly their fish arrives daily from Japan's main three fish markets.
I'm not sure what your expectations are and how good the tailors in Sydney are, but i wouldnt say San Francisco has strong tailors. I've used Seymour's but the work is only so so. The other tailors are mainly made to measure. Definitely not worth going out of your way for in the short six months you are here. I would save your sartorial adventures for another city.
If you like food though, you're in for a treat.