Why should I buy an Xterra

I currently drive a '92 Jeep Cherokee, which probably will not last too much longer. I am looking at used Jeep Grand Cherokees, used Jeep Wranglers, and used Xterras. What should I look for in a used Xterra? Why should I buy an Xterra over the other two choices? I do moderate at best off roading (camping in the mountains and such) Any help would be appreciated.