I did the Rubicon JK Unlimited because it had the 4:1 transfer case gearing. Mine came with 3:73 gears,
but they work okay with my 35's. I plan to change to 4:88's when I get the 37's.
I have a TeraFlex 2.5 lift and find it works well for now. I have bigger plans later and the 2.5 kit was cheap...