MacHokie:
I would urge you to drive a 5.7 unit before buying one. I drove one in Boerne Tx, expecting to order that version. The salesman urged me to order the 8.1. I found the smaller engine adequate, but not inspiring, and followed his advise against my instincts that I ALWAYS know better than a salesman! Think of towing a boat or other vehicle, before deciding. As for test drives, get in touch with some dealers in Las Vegas, and strike Nellis with your Eagle. Then you can decide if it's worth driving down there with your family!