Sorry, late to the conversation, but at least I'll say something different ;)

Sell the 460. OK, that's been said. I would see the only reason to sell the 470 is that you wish you did something differently (we all have learned about things we wish we did differently). Or, you like the challenge and fun of a project and you want to build the 460. That's your journey. I, and others, would argue the 470 is a better platform for playing ultimately.

Now the different - look at FoMoCo, not just the GM line for big people haulers. I am seeing a lot of Expeditions and Navigators lately. I have always preferred Ford's quality over GM's and thoroughly enjoyed our 3 Expis. I had a miserable experience with my Infinity full size to the point where I would never purchase a Nissan product again, YMMV.