IIEQ Pro

The IIEQ has a M/S EQ with Analyser for each - the Mid and the Side. You can visualize and work with them both in one Window. That is a feature I haven't seen before and might be useful for Mastering, although it is recommended as a track-EQ. The Sound of the EQ is fantastic and you get a good workflow. Negative is the point that (in Reason10) the presets load not until you move a knob on the EQ. But it works and doesn't need much ressources of the CPU.