Be aware that while 4x4 is a big help, it's far from being a cure-all. It can get you a lot MORE stuck if you aren't careful.
Dodge's Megacab has a huge backseat but a very small bed. If the bed is big enough for what you want to haul, you'll like the cab. I have an '08 with the Quad cab. The driver's seat is very comfortable for me at 6' and there's plenty of leg and head room left over. The gas and brake pedals can be moved forward and backward as needed to fit the driver.
Mine's a 2500 so I don't know if this applies to the 1500: Dodges sit high. You're tall but the rest of the family might need steps or nerf bars to get in comfortably. I strongly suggest wheel to wheel nerfs so you can step up to reach into the front of the bed.
