There is a knockout exhibition of Francis Bacon at The Met that must be seen if you are in NYC this summer. The paintings he did of George Dyer (above) are so emotionally satisfying you'll find yourself lingering longer then you ever have in a museum. Even his self portraits (below) are mesmerizing.
Also worth checking out is the movie Love is the Devil with Daniel Craig as George Dyer. Derek Jacobi is uncanny (and campy) as Bacon. It may have been a TV movie made for the BBC (and only available in 4x3 on DVD right now) but it plays like the real deal.