That ZDX is a rare gem and if it's working for you that's great. If you don't need the latest features or a larger cabin and you really appreciate the ZDX's distinctive style keep it. The MDX is a solid SUV but it's a more conventional choice. Unless you have a specific need for the MDX's...
You'll have to wrestle with them a little bit to get them off at first, but once you get the first one, you'll understand how they're put on, and the others come right off.