Several threads on this already, but it can be a lot of reading. I think the easiest and cheapest option is what I am about to do for my 2016 with quad halogens: standard Philips h9 bulbs to replace the h11 low beams and 9011 bulbs to replace the high beams. The majority of people who do this swap, not just on Rams, report that it is noticeable and worthwhile. I got all four bulbs for $46. Google search h11 to h9 conversion. I have the modified bulbs, but haven't installed them yet.
A bigger upgrade would be to convert to projector assemblies and add a quality HID kit to that, but that is a lot more $$$. After all the stuff I read, I think I would do TYC projectors and Morimoto 5500k/35W HIDs. And don't forget, just changing the color to whiter(bluer) light doesn't equal more light or longer sight distance.
Just to be clear, I am the opposite of an expert. My only experience is modifying my new bulbs (not installed yet). I'm just someone in the same position as you trying to save you the time of reading all that stuff.