I am running 5.38's with my 37's...in addition to the Gen2 Stage 2 (intercooler) RIPP SC.
Where I live (an hour West of Atlanta) it is hilly, and I often tow a trailer. So, this makes a great combination. Extra power and the proper gearing.
2008 2-dr Rubicon, auto,
RK 2.5" Max Travel lift, Fox 2.0 shocks, 37" Nittos, 5.38 gears, River Raider skids, Warn VR8000-S.
RIPP Gen 2 Stg 2 Supercharger.
Bunch of other junk.
"Y'all kin say whut y'all want 'bout the South, buy y'all never heard o' nobody retirin' an' movin' North."