Top end american models are very comfy. There are some models with pneumatic suspension, in Expedition is called self leveling suspension, Lincoln Navigator has it as well, also VW Tuareg ( Q7 & Cayenne ) has it. In Expedition this suspension is an optional feature but the Navigator offers it by default. 3.0charlie had a second gen Expedition, you can ask him more details on it. For the comfort and the 4x4 I would bet on a Navigator .