Two of Boston's greatest arts organizations will drop highly-anticipated projects over the next two days: Boston Ballet premieres Jiří Kylián's Bella Figura (above) tonight, while Boston Lyric Opera opens Britten's A Midsummer Night's Dream tomorrow - together these productions probably make this weekend the culmination of the spring season. Alas, I'm going to have to skip Dawn Upshaw (whom I adore) at Celebrity Series to catch Midsummer (but you could see both). And on Saturday I have to put off Antony and Cleopatra at ASP in order to check out the intriguing Seventh Sense by the Armenian National Centre for Aesthetics SMALL THEATRE at the Charlestown Working Theater (in what felt like a flashback to the Cold War, btw, these artists actually had trouble traveling to America due to visa hassles). Then on Sunday, I'll see and hear Mozart's Requiem at Handel and Haydn, under the direction of Harry Christophers. As you've probably heard, we're wild about Harry here at the Hub Review, so we expect a very pleasurable afternoon - but even if you miss it, you can still catch the performances at a later date; the concert is being recorded for release on the CORO label in September.