I was first introduced to Mission in the '80's when I heard a pair of 770 Freedoms, the design that put Farad Azima and Mission on the map. Because of that experience, I bought a pair of 780 Argonauts, the flagship of the line, in the late '80's and they are still serving me well to this day. In fact, they are playing behind me right now as I type this
The 780's are supremely efficient (95dB/w/m), extremely dynamic (back in the day, John Atkinson compared them to Krell driven Apogee Diva's!), and a bit bright thanks to their semi-horn loaded tweeter. It doesn't take much to get these things rockin'. Back in the day, I used a PS Audio 4.6/B&K ST140 front end to great effect. Alas, when I upgraded my entire rig, the trusty Mission's moved to my office and are now being capably driven by a Cambridge Audio 540a/540c front end. The hot treble requires warmer sounding gear that excels at low level microdynamics, otherwise the speakers become fatiguing after a while.
Over the years, Azima left Mission to focus on NXT and Mission was eventually purchased by Verity, the same group that owns Wharfedale and Quad. Unfortunately, while Quad and Wharfedale have received the necessary funds to expand their product lines, Mission floundered. For a long time, Denon USA was their distributor, but that ended 5 or 6 years back and there have been numerous false starts since that time. Finally, they have employed Quad's distributor and one can only wonder what took them so long?
I'd love to see the brand make a comback in the US, but they have a tough road. With so much manufacturing moving to China, it will be difficult for them to regain their mantle of hi-end performance without the hi-end price.