That is the box I was considering as well. Then I found a vendor selling the Xzilliraider standard box 30/60/100hp for under $350 and chose to go that route instead. I know have a little knob where I can choose the power level I want on the fly, including stock, which I do not think the XZT offers. I have been running mostly in the 60 hp mode,which is similar to the XZT's only setting. I do not know what the rail pressures are but boost is up some, and EGTs are pretty easy to keep in check. I haven't towed with it yet though. It did set a code that cleared itself after a few key cycles on the 100hp mode.
I like it, it seems to work as advertised, the power increase is very nice, smoke is low. I am glad I went with the standard box over the XZT for the adjustability, and stock setting.
I would definately run gauges if you tow with any box though, hitting 1500 on the 60 hp setting can happen, even empty.