The best sushi I've ever had is two blocks from my place... you can only get omakase (chef's choice) on weekends and you'll spend over a bill per person. The owner is the sole chef- his assistants help plate and garnish. He uses pretty unique flavors that complement the fish, like jalapeno, ponzu and wasabe (there's none provided on the side for a reason). The place gets fish flown in from Japan every day- including butterfish, skipjack and the best toro this side of the globe. My favorite is the blue crab handroll.
The place is sushi nazi too- 1) you can't use your cell phone while eating. 2) Eat each piece fish side down (contrary to the popular rice side down). 3) Clear each piece within 30 seconds of it being served. 4) Don't ask for anything during omakase (especially Americanized stuff like California rolls, etc). 5) Most importantly, only dip the piece in the shoyu if it's preceded by permission (most of his fish don't need it). I've seen people kicked out of this place because they don't follow the rules... Chef Keizo takes his art super seriously.
Sushi Zo on Yelp
* If you guys don't already use it, Yelp is the best (free) resource for finding restaurants on the web- no zagat payola... real reviews, real people. You can also find the most honest mechanics, reputable dry cleaners, whatever business you need here. That's my shameless plug for the week hehehe.