See my sig.--I have two now and had a 2003 before the 2005. I have had real good service from the 2003 and the 2005 and expect even better from the 2006 F 350. DO the maintenance and have problems checked out immediately. We love ours.
Extend the towing mirros out, during washing and drying. Use air compressor, limited to low pressure, to blow excess water from all nooks and crannies. Has worked for me for years.
Both of our trucks (see sig) ride like a dream. The 350 actually rides somewhat better on similar rodes I think due to the long bed. We love em!!No changes at this time.