Really, you should look at it the same way ppl look at Power Supplies for computers.. A little overkill is good!!
If I was you, I'd get a 3/4 ton w trailer towing package.. Because you invariably end up towing units that are
bigger and heavier as time goes by.. That is what happened to me... I ended up trading in my 3/4 ton Pickup
on a Chevy dually 6x6.. But I pull a +6 horse 5th wheel trailer, flatbed w big Kubota tractor, boat, and 32ft
travel trailer... Its just the way things always work out!!! You'll wish ya bought bigger later if ya buy a half ton...
RC