Hey Guys ... I ended up purchasing the Shure PGXD yesterday. Once I dialed in the line level signals, I could not hear any coloration or signal degradation as compared to a quality 10' cord. 2 other things I personally preferred over the Line 6 G50 are: the form factor, the PGXD is easily rack mounted and the antennas are on the front of the receiver. Also, the specs rate the battery life at 2x that of the Line 6.
The litmus test will come later today and rehearsal but I am confident it will perform great.