Newbie Question! 7.3 or 6.0???

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Hopefully this doesnt start world war 3....haha

I am looking at buying a Econoline diesel van to haul my dirtbikes and travel to races, due to the reliability and improved mileage over a gas van. I am debating over getting a 7.3 or a newer 6.0. I have friends with 7.3s and the swear by them. I also have a friend with a newer 6.0 with low miles and he likes his too, BUT, i have heard alot of bad things about the 6.0 so I wanted to get some opinions on them before I make a decision.


Also i wondered what motor would be better to get alittle more reliable power out of with a chip or tuner ?? Thank you!