I've settled on Type 3 (the Multiples fire parallel beams, and R1 adjusts the distance between them). You can't move the beams so that they all fire behind you during sections of boss stages (the main draw of Type 2), but you can adjust the beams on the fly without stopping the ship, and the slight crippling you take when fighting bosses is offset by the sheer mayhem you can dish out during the rest of the stage.