When I was looking at the Air-X and Breeze, I believe now I may have come to a false conclusion about them. It seemed to me the X was more for off-grid cabin use (where you're more likely to be able to put it up high) whereas the Breeze was more for RV or sailboat use, where you'd have to make do with lower and more unstable winds, and as a trade-off, you get less potential output. I had no idea SWWP or Alt-E considered the Breeze an "update" of the X! I may have bought the newer one if I'd known that. Still, my Air-X has only been in service for a few weeks, but it has shown its ability to serve its purpose.
Maybe for my usage (on my off-grid garage w/ EV charging), it would be a good to have both a Breeze (lower startup, but lower potential) AND an X (higher startup, but higher potential) on the same building. For most people, though, it seems like the Breeze is the best option, and the Air-X was more mystical math than realistic performance?
If you are considering 2 Air turbines, think about putting a bit more yet into it and look at Whisper. There is much more power to be had, even with the smallest, and swept area is substantially greater. I am happy with a whisper 100.
Jim