either one will be fine for what you're wanting, however if the diesel is a 03 or 04 run from it. the later model 6.0 are not that bad. the V10 EX will drink alot of gas but they're nice and have lots of good power. Oh welcome to the NC chapter!! you've been to Jimmie Morrisons on Old Charlotte rd? where do you live, I'm in Kannapolis just up the road about 10 miles..