Aside from the power steering pump having an orgasm, your other issues with the Z also happened on the JEEP. This leads me to think it's likely due to your driving conditions rather than a Z problem. How are your roads out there? Also, your laundry list for the JEEP is longer than your Z
maybe a Z car just isn't right for you and you're better off in an off road vehicle. Anyhow, enjoy the new toy and drive safe