When I read your original post, I expected you would get the diverse cross section of comments, which only causes more confusion.
First, I own a 2014 Rubicon X and my wife owns and LOVES her 2009 Unlimited X. Both are 4 doors, and after driving my wife's 4 door, there really wasn't much of a choice for me, as I love the extra room. This is my 9th jeep, and my jeeps range back to a 1942 CJ2A into which I stuffed a small block chevy. I am also currently converting the leaf springs on my 1978 CJ5 to a front 3 link and a rear 4 link with King coil over shocks. So, I've been around jeeps for almost 40 years, and I've owned a ton of them.
When I bought my 2014 Rubicon X, my intent was that it would be able to handle any terrain from Moab (which I have done) to sand washes in the middle of the desert. I ordered mine, so I got exactly what I wanted. The reason I spent the money on a new Jeep is that I also purchased the ZERO deductible MILLION MILE WARRANTY. I'm limited as to my modification, but I am planning this jeep as my last Jeep. In fact, my brother and I picked up our new Rubicon X Jeeps on the same day, his is black and mine is white.
The Rubicon has all the creature comforts, comes with lockers, great gears, etc, etc, etc...and it's all covered by the factory ZERO deductible MILLION MILE WARRANTY. We have the same warranty on my wife's jeep which we purchased new, and my brother has it on his Rubicon X.
If you plan on keeping this jeep, buy a new Rubicon and buy the factory ZERO deductible MILLION MILE WARRANTY, as it really covers everything. Your modification won't be robust enough to impact the warranty, and you can wheel knowing that whatever goes wrong it's covered.
For those who think lockers are just for rock crawlers, not so. Lockers have gotten me out of trouble in both snow and sand, and sure beats breaking out the shovel. Just push the button and walk out of whatever has grabbed your jeep.
For those who don't think the 4.1 T-case is too low, not so. Remember, your transmission has lots of gears, and you don't have to start off in 1st. In low range, I can start out in 3rd and then shift up from there. How fast do you really need to go in low range? For me, 20 mph is plenty fast enough, and that's totally possible in low range if you just shift the transmission.
Finally, add a winch...I'll say it again, add a winch. Winches are cheap and easy to use. Get stuck in snow, mud or sand and the lockers have not help (yes, I've been in this situation) and you will be thankful you spent $500 on that winch and mounting plate. If you never use it, you will find that you will go more places, as you won't be nervous about getting stuck.