If you go with DRW (which I'd recommend with your use), I suggest the F450. I test drove many super duty trucks (SRW, DRW F350 and F450) and ordered a F450. The turning circle is just amazing and the bigger brakes are nice as well.

 

As said you will probably be very close to maxed out with your mini ex and nothing else in the trailer. The other thing to think about is that trailer is rated at 25k. If you plan on loading your trailer anywhere near max with dirt or whatever else you plan on hauling besides the ex you will be way over max for the srw truck.

 

I had the trailer weight upgraded to 30K.

 

Hey Guys, here is a picture of the truck with the trailer, it seems to tow ok, having never towed before I could definitely notice the difference!