The G500TXi is a LOT more than a G3X. It does more and is a bit more configurable, but a great piece of tech.
G3X - $11,895 list
G500TXi - $17,305 list.
And the G500TXi requires a second 7" screen and setup to add Engine monitoring at another $10,960 for a 6 cylinder. G3X EIS adds $3,245 to...