Welcome to the forum
@akkpao - I'm no expert or salesman/dealer but I'll just share my thoughts and I'm sure there will be multiple posts from others and probably more from me as I have more time.
First, price. To some, it doesn't matter, I get it, I'm not in that boat. The xcub is their top of the line fit and finish, it's the fastest and most aerodynamic. I believe it also has the highest usable load. Yes, the cowl is bigger for cooling I'm sure. But the prop needs to be considered in the end for your needs. The NX comes with a smaller 76" prop whereas the tailwheel configuration I believe can have up to an 83" prop.
I chose the FX-3 as I wanted the newer flight controls (G series), stick grip, the blend between cross country flying and back country flying. I wanted the fuel injection and constant speed prop. It was the perfect blend for me. I'm in Virginia, far from an ideal place for a backcountry airplane. But the stick and throttle concept like my former life got me interested in GA again as I just couldn't do a Cessna type..yoke, etc.
I'm sure I have the heaviest FX-3 ever built with cargo pod, BRS, and all of my spares I carry

And there is no place I can't go for my skill level that this plane can't handle...or desire for that matter.
The UL is obviously the hot thing, doesn't appeal to me for a number of reasons.
It's going to come down to what do you want to use the airplane for? Are you going to fly it? So many cubs from CubCrafters seem to hit resale in the low to mid 100 hour point which I just don't get. Are you going to be comfortable with a 600K xcub in the backcountry? All of the CubCrafters' cubs are stupid expensive. I really enjoyed the Sport Cub (predecessor to the SS) that I did my TW endorsement in. Something far cheaper and less complex probably would bring me more joy in the end. I enjoy the Garmin glass panel as you are familiar with but it's never ending something somewhere going on. I tell friends, if I did it again I'd get the best J3 money could buy.
I've enjoyed the learning which I've shared my journey. I have a passion for learning. But not having any real CubCrafters expertise in my area for maintenance or repairs is a concern should I need help someday. We do have Don Wade of Patriot Aircraft in AL that is great with CubCrafters planes so if I needed help I'd go to him. Most "service centers" are simply "someone that's worked on a cub before" which I went to for my first condition inspection and never went back, that was eye opening. So be prepared, depending on your location, to have to learn to do things yourself, which isn't bad. I do know of a good service center in KY but it's a bit far, Johnson Aviation - he's outstanding from what I hear.
I think the FX-3 is one of their most popular but obviously from a money making dealer point of view, they're going to push what brings them the most money, that will be the XCub. Follow the money, do your research, make YOUR choices. I was pushed onto things that I later learned simply brought more money but I was firm in what I wanted, researched, and made my plane exactly as I wanted it.
That's it for now...I look forward in following your journey and feel free to post anything here and we'll gladly assist. Oh...be sure to get the IFR panel which I'm sure you will. I'm seeing VFR paneled planes really struggling in resale.