As far as I am concerned, the Metris is the best long distance car I have ever owned. The Sprinter is much less refined, and a much harder ride (granting the model that I drove had a GVWR of 9,990, and was substantially overloaded at the time). The Metris has a level of stability and maneuverability no vehicle this big, and especially this tall, has any right to have.
It is not a luxury car, by any stretch of the imagination, mind you. And it is not a rocketship off the line- although I would say that it is more than adequate. It has a top speed, electronically limited, of 101 mph. I get this not off of road test data, but off of my PNDs speedometer, because I have hit that speed frequently.
I do not recommend the Metris be driven with out cruise control. It is so confident, capable, and refined at speed that you will easily be going a lot faster than you intended.
In terms of commercial vans, the Sprinter is the only vehicle that gives this a run for its money. Der best oder nichts.
Disclaimer: This is the only vehicle I have owned that was designed in the 21st century. It is one of two vehicle I have owned who were designed after 1985.