I'm a long time reader of the forum, posted here and there... I remember reading threads about clunks, whining, and vibrations reported by 4x4 owners. If I go 4x4 I'll probably have the QT1 system (which I understand is more like fulltime AWD).
Is it a quiet, seamless, trouble free system? Any owners with complaints in recent build GCs? I probably don't need AWD truthfully (I live in Texas) but it does add a measure of utility that it seems like a Jeep should have.