Mr. OmaKase does what few sushi counters dare to: deliver world-class omakase for under $100. Its evolving 10-, 14- and 18-course menus come with surprises that go beyond raw fish (like chawanmushi or fried hamachi), and the vibe is informal but still exacting, as chefs carefully assemble each piece to order while a soundtrack of throwback tunes plays in the background.