Seen or read or both? Read them all. The phrases are exquisite.
Last summer I saw a performance of Othello front row at the British National -- I've never seen anything so good. I would think, if you can find a quality troupe, that watching Othello is probably the closest you'll get to perfect theater.
Interesting that everyone below mentions movies ... I disagree. There's never been a Shakespearean movie that compared to watching it live in my opinion.