After seeing how your GC performed at cityview, I'd be keeping it and modding some more.
Another two inches lift, 32's or 33's front and rear bars, and some rails.
I reckon it would be a bee's di(k behind a JK in terms of off road ability, the price difference (after you loose on re-sale, and buy the new one)
And it'll be something different. How many Grand Cherokee Rubicons do you see........
Or...I'll swap ya for the TJ