I change my shocks every 50-60k miles, or service (if i have the type) more or less by that time or as needed depending on use vs miles. a fresh set of shocks will make a difference if you're driving your vehicle in something other than just flat/smooth roads. You can push more than 50k miles of course, typically with conventional shocks and again depending on what type of driving conditions they've seen you can drive 100k with them so as long as they're not leaking and you still feel you're getting a comfortable ride i see no reason to switch them.
If you're happy with the stock ride feel and longevity, hit the Mopar vendor here and i'd think you can get a set of factory struts and shocks at a decent price. If you want something a little cheaper and some report same/better ride, KYB Monomax, Monroe Reflex or Gabriel Ultra are highly regarded most of the times for those looking for best stock replacements. Again i think sometimes the perception of a better ride is because people might be replacing worned out shocks for something fresh. In my Jeeps a fresh set of any shocks has always made a really noticeable difference, again i switch them every 50-60k miles. We replaced drivetrain/motor fluids on a certain schedule, we replace pads/rotors on a schedule, plugs, etc etc, your shocks should also have a changing schedule as they do wear out though sometimes you're so used to the feeling you don't think you need to.
Have fun.