I had the same dilemma when I bought my jeep.
Was between the liberty sport w/ popular accessory , skyslider , and full size spare
or the unlimited x wrangler (forgot the options)
i choose the liberty due to the ride comfort and the slider roof. I have had no problems with it and its by far my favorite feature of the jeep. The other thing is the 09 liberty had the lifetime warranty still and the unlimited was a 2010 and didnt have it. Not to mention at the time the liberty has some crazy incentives on it.
Other than the thing not starting up (see my other thread
) i have been really happy with it.