Along with the Abbey, Project Arts is probably my favourite theatre. One attribute that separates it from the competition is the sheer number and variety of plays they show. In the next three months they'll put on ten plays, as well as dance and musical performances and a new visual arts piece.
Project Arts has adapted to the new economic situation by offering some great deals. For most plays you can save 25% by booking before a cut-off date, which is typically a week before the first performance. They also have "real deal" offers such as reduced prices on some nights or two tickets for the price of one.
There are two performances in March I think could be particularly noteworthy: Tiny Plays For Ireland and Agamemnon. Tiny Plays is a collection of (very) short plays put together by Fishamble in partnership with the Irish Times, based on submissions both from established writers and the public. Agamemnon by Aeschylus is performed by Classic Stage Ireland, a theatre company dedicated to classical plays.