Air suspension is awesome feature on the limited's, but don't play with it too terribly much in the winter, it is a sealed air system but could be subject to some condensation freeze ups. But I'm basically in Canada (10 min from the Border in Mn) and I had no issues with mine this last winter.
Good luck on your search.
Oh and if you're planning significant suspension alterations, lifts etc take into account that a limited means you only have air suspension so you have very limited options