Hoping to get some ideas on this. I am looking at medium duty rigs and have 3 that I'm going between. 1. 2004 4500 Duramax w/ Allison 78,000 miles Hydraulic brakes Single cab 2. 2000 F650 Caterpillar 3126 Turbo 62,000 miles Air brakes Single cab 3. 2000 F650 Navistar w/ Hyper Max and 6SP EATON FS 5306 trans. 43,000 miles Hydraulic brakes Crew cab The truck will be used for stone, soil, and mulch. Pulling heavier equipment. All for residential this year. I am looking for motor input and pros/cons of anything you may see. I am certainly getting one of them. They are all within $1000 of each other. I know they are all good trucks, but does anyone see anything that points one in a better direction than the others? Thanks in advance. I look forward to any and all input.