Nah Keep the 20's with a nice 35 inch tire do a leveling kit and a 3 Inch body lift and you will be set. 17's look like crap maybe they look good on a 1977 k20 or something but not a new ram.
I have a leveling kit and I also have the 22in rockstars on order also with 35 inch nito and i'm planing on doing a 3 inch body lift the 35's will fit the way it is now they are just tucked up in there
Just my 2 cents.

 

It's your truck, your money, you make it any way you want. In the end it's only you that needs to like it.

But man, don't take that truck down to Ga.! All the off-roadin' rednecks who actually USE their 4x4's will laugh at you!!!

 

Yeah Excatly its what you like, I think your truck looks great I really just like the big wheel look on the newer trucks,
I have 17's on my 86 1500 with 44/18.5's on it, deff dont think the rednecks in ga will laugh if i brought that down, I'm from fla and we deff have some serious pits down there.

 

I can't disagree the big wheels look awesome, just not as functional on a 4x4. My comment about the rednecks laughing at you (although some would I'm sure) was meant to be more tongue in cheek, buy the smilies are not posting.

Now, I don't think too many of my redneck buddies would laugh at a truck with 44/18.5's on it, maybe drool, but not laugh...