All of the major brand of synthetic and blends are great choices. Just look for sales on the brand you like and stock up! You will use it eventually. Same goes for filters. The Wix/Napa Gold (same filter), Mobil 1, Fram Ultra, etc. There is always a sale going on somewhere. I just use a synthetic I get from my commercial oil supplier at wholesale commercial pricing, shipped free right along with my business oil order. Been a great oil for my previous 2013 1500 5.3 and my current 2015 2500HD 6.0. I catch filter sales and buy several.
You really want to make the oil change job as easy as possible. I highly recommend a Fumoto drain valve as a replacement for the drain plug. Hook up a 3/8 hose to it, flip the lever, and a no mess oil drain. Filter is still going to be a little messy but at least oil isn't going to shoot sideways out of the pan with a valve. I have used them for years with Jeeps, pickups, semi trucks, ag tractors, etc They are a great investment.