The JK Rubi lockers are straight electric, and seem to work pretty well.
The 3.6 is far superior to the 3.8 like Heeps said - good call on that.
As far as a Zone lift goes - it's a product built to a price point, and 4" is a LOT of lift for a JK. You could probably fit 37's with a wee bit of rub on stock fenders with that much.
On a 2012, expect that the electric swaybar disconnect will go within a year of buying it....but that's just a reason to upgrade to a dual rate or anti-rock!