Just like their sister company, Pro Audio Technology, use of any of their speakers requires use of their amps. I have a 7.2.4 going in July. While its a bit pricey to use in just a 3.1 set up given that the amp will do 7.2 so your paying for more than you use, it can be the right solution.

To answer you question, beyond the 3.1, no. But I have done some of the Pro Audio. I personally believe its simply the best. Theory Audio Design is the same company, Paul Hales. They are also going to focus on the commercial market as their systems are capable of 70v as well. All pretty impressive stuff.