Head unit would be a huge upgrade. I have a Rubicon with the factory Alpine. Mine is a 2014. What I did was spec out my factory sub enclosure and picked up a Alpine Type R 8" and put in the factory sub location. The 2015 stock location is the storage box on the floor which leaves you more room to play with. I have not used either of the ones you said about but anything is doable if you put your mind to it. I actually considered buying the stock none sub side panel and placing a sub in the cubby hole in the floor. Decided against that route because of my dog riding back there.
The Alpine type R with the small enclosure requirements hits extremely hard for 1200 I am sure you could buy the 2014 enclosure the sub an AMP and wiring stuff and still have some money left over.