In my 27 years of driving experience, I would say the best vehicle UPS ever put on the road is the one I am driving now...a 2006 Freightliner P-700 665-series with the Mercedes diesel, duallies, and the Allison 5-speed automatic. It has good ergonomics, adequate power, and is overall an excellent work platform. My only complaints about it are that it weighs less than comparable P-7's from the 90's so it doesn't do as well in the mud or snow and it rattles and squeaks a lot more. Mine has 230K miles on it and it still runs strong.