[arcticdude]

You may want to wait for the 2016 F650, supposedly available in spring 2015. They're touting unrestricted hp and tq ratings, unlike everybody currently. You're supposedly going to be able to order configurations with higher ratings than before.

Also, it's supposed to have a 5 year/250,000 mile powertrain warranty.

They're also going to offer dedicated tractor configurations for heavy towers.

Might be interesting!