What is the weight you will be towing? 2 Doors have lower tow limits than the 4 door. A Sahara is about "pretty" (ie body color fenders) and creature comforts. A Rubicon is nice if you plan to rock crawl or run really big tires. A Sport will get you through most "offroad" that isnt seriously sideways.
Go 2012 up for the 3.6 Pentastar. If you can swing it financially, get new.
2014 JKR Granite Crystal, 5.13 Auto: RK X Factor 2.5 Inch Lift, Artec Front and Rear Truss, Artec Rear LCA Mounts/Skids, Poison Spyder HD Crossmember, Rock Hard Gas/TC/Evap/Oil Skids, Rough Country Front & Rear Diff Sliders, Nitto Trail Grapplers 37x12.5x17, Pro Comp 97 Series Wheels, Synergy Weld On Rear Trackbar Bracket, PSC Hydroassist, T6 Aluminum Tie Rod.