Sears sells a 21 inch lift floor jack for SUVs which is perfect not only for a floor jack, but, also for trail and flat tire use. I think it only weighs 40 lbs and lifts 2.5 tons. Though I would bolt it to the floor with grade 8 hardware and a backing plate so it does not become a deadly missle in a bad accident.
I carry a floor jack behind the seat of my Ranger instead of that bottle jack. It just makes changing tires so much easier, especially if you are helping someone else with a different model car.