Hi, Seadogs1, like Pryso I also consider the zA2.1 a cornerstone product, and for me, likely my last speakers. I've evolved from a few traditional box cone designs to planar magnetics (Magnepan), to now these fine ESLs. Going to an ESL wasn't the question, but which one was. I quickly decided to move away from large dipole panels and that eliminated all ESLs except a very few. David's hybrid design is flawless in cohesive blending of the woofers and ESL panels. The smaller design fits perfectly in any room. Don't be fooled by the size however, as they can play big and don't change their character as the volume raises.
That last and almost unique aspect was correctly highlighted by Robert Greene in the January issue of the absolute sound. Robert has a very complete 5 page review of the speakers, but read through it fully because he starts out saying they are fussy to set up. That part is bull, and I've already sent a letter to the editor which will be printed in March.
If you are a serious buyer, do so before the end of the year. The price is going up. Amazing speakers.