We owned an '04 Southwind 36E for 8 years and 110,000 miles. Loved it, interior was getting pretty shabby towards the end. On a diesel chassis I would have redone the interior instead traded up to Tiffin Phaeton, major difference in factory responsiveness to any issues (and there will be issues). Second choice was Winnebago and the only reason I didn't was the salesman failed to show it to us on a timely basis. So from my perspective you cannot go wrong with any of the manufacturers.
Towing - we have towed 4 down for 14 years and about 200,000 miles. Have watched people setting up tow dollies in many campgrounds, I might do that in an emergency, but I really like having the tow'd vehicle solidly connected to the coach with a towbar. Your towing capacity is 3,500 lbs and the the dolly reduces the weight of the car you can tow by its weight! We towed an '05 RAV4 which came in at just about 3,400 lbs on the scales.
Looking at the 2011
Towing Guide I don't see the Element listed as towable 4 down without modifications. A dolly may be your only alternative until you are ready to change cars.