The Saris Bones is the best rack of it's kind. It's very easily adjustable to keep the bikes away from the car and very stable. I think the farthest we used it was about 250 miles carrying 3 bikes.

Take your new car over to your LBS and make sure it will fit before you buy. When our SUV was totaled out we found that we were not able to fit the Bones onto the new car.

And yes, if you have the Bones pads resting on the trunk lid they will eventually scratch the paint. I ended up buying a receiver hitch off of e-bay and going to hitch mounted rack.