AirEQ 5.1 features : 

• Multichannel 5.1 plugin : allows equalizing 5.1 busses with unprecedented ease of use. Dedicated LR, LsRs, Center and LFE channels are directly accessible in a mouse click.
• 5.1 Options : you can link the different channels, configure the 5.1 busses, and use the numerous display options of AirEQ…
• Musical Adjustement : The AirEQ sound is made not only by its accurate analog matched curves: when you adjust the AirEQ parameters, the variation follows your hearing sensation. The result is more natural, and you obtain the right sound and equalization setting quicker.

The AirEQ 5.1 Native is available in the Eiosis' store for €200, the TDM version is available for €400. 

The standard AirEQ's price is now €180 instead of €200. http://www.eiosis.com/aireq51