I have also drove several DP's. I was also not impressed with the ride. At highway speeds they were not any quieter than my 2 gas MH's. The acceleration and hill climbing was no better and in some cases worst.
I now tow 4 down. I used a master tow dolly for many years. It is not near as bad as some people a saying. If a different car needed it I would go back to a dolly. Towing 4 down is not worth buying a new car, but if you need a new car consider getting that can be towed 4 down.