I've also had issues with my window motors. There's been a few times my driver side window wouldn't go up. And if I have the window down at high speeds, it won't go back up all the way. I've owned 2 Chevy's in my life and both have had cheap interiors.
I have plans for the Z. I want both the 2in body lift and suspension lift. Maybe one of them will come middle next year with the other not too far behind. I also will be upgrading my tires from stock 31's to 32's when I need new tires.