I've used xta for many, many years. I own 3 of them, and always hand-carry one 448 when on a fly-dates tour. It is the most powerful tool in my arsenal. I nightly am re-building PA systems on-the-fly, quickly, and invariably always get a result vastly improved on the install. Time-alignment, good control over the band passes, and phase, coupled with those powerful PEQ's is a wonderful experience.
Plus, the AudioCore software (free) is incredible. Conversely, I've owned one KT DN9848 for over 5-years and have never, ever been able to get it to handshake with my laptop.