From what I see, your Overlander has specs of a
Dry Weight – 4510 lbs. with a Hitch Weight – 480 lbs. Even with loaded, I doubt your going to get past 6Klbs, so
1/2T can work well. You can see all the opinions on which truck, and which size. As others have suggested, you should really first
decide if you want Diesel or GAS. There are
significant cost differences with diesel, for service, DFT, service maintenance, cost of diesel fuel, and of course some folks (like me) don't like dealing with diesel fuel smell and other issues- but that's just me.
I would then drive both the 1/2T and the 3/4 T models around a parking lot as well as on the road, park them both and see if your ok with the larger truck. No doubt the 3/4 T's are able to pull more weight and haul more payload,
when properly configured. If your looking for a "daily driver" primarily, you will likely find the 1/2 T models to be more than capable and easier to maneuver than the 3/4T; just make sure you get a 1/2 T with decent payload and good hp/torque rating for your needs. If your going to be "full timing" or going on many long trips, you might well want to get the 3/4 T. Many of us have had this issue...(some of us still having
"this dilemma": 1/2 or 3/4) Ohhhh the agony of choice...