I buy from well established companies that will stay in business for a while and provide great support.Good point ... up to a point. These are volatile times, we don't know who's going to buy whom, and most important, what they're going to do with our favorite brands when they do.
My first stereo system was an Altec-Lansing. They're still in business, but their home speakers with handrubbed oil walnut cabinetry are long out of production.
Other speakers I've had are ADS and Mirage (I still have several Mirage speakers and subs).
I really *hate* what Audiovox did to Mirage--they raided Mirage's patented Omniguide design and threw it on miniature "lifestyle" speakers assigned to a Scandinavian company they had acquired. Under Mirage, the Omniguide was featured on their $7500 flagship OMD-28.
ADS as we knew them and Mirage are both gone. In fact, in 2013 I saw the replacement parts for Mirage rapidly disappearing, so i sold my 5-yr-old OMD-15s and bought a pair of Magnepan 1.7s, which I still have (and really enjoy) today.
And although Thiel is still in business, the late founder Jim Thiel's design principles of time-aligned drivers and especially, first order crossovers, have been abandoned.