Two comments on these issues:
1) On low range: I would personally not consider a 4wd without low range if you are going into the backcountry. On rough terrain the mantra is "low and slow". Low range is also very useful for climbing steep grades and particularly for descending steep grades. I use low range a lot here in the mountains of southwestern Colorado. My Libby is a 6-speed (I like stick shifts), obviously with Command-Trac, but I've driven a friend's Wrangler with automatic and selec-Trac over Black Bear and Imogene Passes (two of the classic routes here) and the automatic also works just fine in low range. So I'd get the vehicle with low range.
2) Ground clearance: take a tape measure and make your own measurements. I know the brochures list the Libby's clearance at 9.4 inches, but with the full set of mopar skid plates (which I like) and 225/75-16 tires, mine actually has 7.0 - 7.5, depending on where you measure. A lift is needed this spring. My skid plates touch rocks that I've never touched before in any other 4wd I've driven in this area. Other than that, I get 20 mpg overall with 23+ on the highway and really like the Libby.
So if you plan to spend a lot of time in the boonies, I'd recomment the Libby. I'm a big fan of AWD in sedans and sports cars (I'd love an STi), so if you want your cake and eat it too, get a Libby with automatic and Selec-Trac, and pay for the extra gas. And either skip the Mopar skids and pick your lines through rocks carefully or budget for a spring-type lift.