One interesting fact about the 5'7" vs 6'4". I did this comparison to make my final decision. I do not haul much in the bed so the decision for me was economic.
Day 1 you pay about $300 more for the 6'4".
Year 2, The 5'7" books for $1725 more ($1227 more in trade in)
Year 3, the 5'7" books for $954 more ($923 more in trade in)
Year 4, the 5'7" books for $2215 more ($1717 more in trade in)
Year 5, the 5'7" books for $1518 more. ($1433 more in trade in)
Compared on KBB, Private party Sale, Boston, Laramie Crew, 5'7" vs 6'4". Same options.