Does anyone out there have a Grand Rapids Tech electronic flight instrument system?

I've been contemplating the GRT SX Sport versus the Dynon FlightDEK-D180 for my project plane.

I really want to have a single box that makes up flight instruments and engine monitor. The GRT system is newer and there doesn't seem to be as many in operation as the Dynon. Both of these systems have pluses and minuses, so now I'm looking for testimonials...