I have a 2014 RAM 1500 Laramie crew cab with the 5.7L Hemi and adjustable air ride suspension. Hands down the most powerful truck I've owned and also gets the best fuel mileage out of any truck I've ever owned. I have some after market parts, (throttle body, intake, throttle controller, and Diablo tuner) and it's not hard to get over 20 mpg cruising down the highway at high speeds. (And i havent even tried the 'economy' tune) Cruising with my 18 ft aluminum fishing boat with 150 HP 4 stroke outboard motor, fully geared up, and wife and son in the cab, I get about 14-15 mpg on flat highway. So still very respectable towing mileage.
2014 is where they went to the 8 speed transmission and it really improves pulling performance on hills and acceleration. Also helps with fuel mileage when the multi-displacement kicks in and it's running on 4 cylinders. I'm pushing over 450 HP from under the hood so she'll flat get up and go when I need her to. My truck will run normal 87 octane, but I spend the extra money and only run Premium 91 Octane fuel or higher. Burns much cleaner and you'll thank yourself later for not putting junk fuel in your engine. Just the same as I only run the best 15,000 mile synthetic (racing/towing) oil, yet change it every 5,000 miles. The little extra care will pay off in the long run.
The 4 corner air suspension is a towing man's dream. Full auto level sensing never let's the ass of the truck sag no matter how much weight you put on the hitch or in the bed. Cornering is unbelievably stable. Hands down the best suspension a person can have for towing. Even for just daily driving the air suspension makes the truck feel like a sports car in the corners.
I would also recommend the Ram Box bed if you don't plan on hauling anything really wide in the bed. The built in tool boxes are one of my favorite features on the truck. I use the passenger side box for emergency fishing gear...yes there is such a thing in Montana. Lol. Drivers side is tools, tow straps, jumper cables, etc. Both tool boxes and tailgate lock and unlock with the doors when you press the key fob. Very nice touch by RAM trucks so you don't need to use a key on the boxes every time you want to lock and unlock them.
All in all, RAM makes one hell of a truck. My whole life I was a GM guy, I drove all kinds of Ford trucks at work putting many thousands of miless on them. Even made the mistake of owning a Toyota Tundra once

Tho Im only nearing 33,000 miles on my truck, I have labeled myself a fan and firm believer in RAM. They know how to build a truck
Here's a picture of my dash while cruising down a flat stretch of highway at 77 mph. If you look in the bottom left you'll see my current fuel mileage. (Sorry i didnt dust my truck that day) It's was jumping from 21-22 mpg the whole way. I can get better mileage going slower.
Although my truck is rated for over 10K towing, I would probably go with a 2500 Cummins diesel RAM if pulling 9,000 lbs regularly. Figured I'd tell you about some of the features on my 1/2 ton tho because you can also get them on the bigger models.