Well, I had been contemplating the QA1 unit, but the AJE looks quite a bit better thought out, and has the option for r&p steering and either struts or coilovers. Subscribing as well.
AJE is a great company for Mustangs. I was also thinking this route a couple of years ago. I did a lot research for the Mopar stuff and found that they have issues with bump steer that can not be fixed easily. I ended up also going with the HemiDenny unit and love everything about it.