Thanks for all the replies. I appreciate the advice. We 4-down towed our 2003 Honda Accord for about 2500 miles last year with (almost) no problems but the car was totaled by a distracted driver (please don't text and drive!) in Charleston a couple months ago. I'd read that the 2010 version could also be towed, but was looking at a dolly mostly because of the inconvenience we suffered after the accident when I had to rent a car (actually the other driver's insurance company did) for us at each stop during our trip to Key West. With a dolly, I could have just kept one rental for the whole time. Still, even though there are lots of good reasons to purchase/use a dolly, I think we are going to go back to 4-down. Again, thanks for all the help.