Factory alloy wheels were my truck's weakest link. Next was tires. Why not get a 3500 class for future proofing your wants/needs? Is the price that different? I have been out of the truck market for a long time.
My truck's options added about 1000 lbs. and suppressed my cargo rating. Be careful how much stuff you add to the truck. Whatever you do weigh the thing at a scale on the test drive for real data. It was the only way I could get my mind around the numbers and have real facts. Truth is better than guessing.