I've used a couple of styles of carts and all I can really say is make sure the wheels are in the center of the cart. One cart I had the wheels were off centered a bit and you actually end up holding a lot more weight than you would like. Hated that thing. Bigger tires are better, also.
But I can't help but to mention that I now use a jetsled to do my hauling. Definitely worth thinking about.
Slides easily over just about anything.
You can tip the front up to your tailgate and lift it right in all by yourself. Blood and everything stays in the sled so no need to wash out your truck bed. Hook the rope to an ATV if you want to pull it. Just to name a few. I know I'll never go back to a cart.
Otherwise good luck, hope this helps.