That bed issue has been changed with new trucks. You can get either the 6.5 bed or the 5.6 bed with the CC. The GMT900's that was the deal.
Interesting discussion on resale values. Different philosophies I guess. I buy and sell equipment all the time, I am an end user not a dealer, not just pickups but large trucks and yellow iron. I do buy with resale in mind, it may not be the biggest factor but always a consideration. Unless it never leaves your hands after you buy it really should be a consideration if you want to get the most out of your asset. But each situation is independent of the others so there are no hard and fast rules, way to many variables at play.