We will I am sure go to the F-350 6.4L this summer as our traveling habits have changed and the diesel makes more sense now.We did test drive the 6.4l for two days and we were impressed with the performance. We are awaiting some good rebates and that along with the X plan will make the truck affordable.We expect to see some good rebates in the near future as Ford, as well as the others, are in big trouble.How ever..I would not be at all unhappy if we were to stay with the V-10..It performed much better than expected in all areas in 112 days and 8500 miles over all kinds of Terrain while wintering in Az, MN and Texas