5th wheel hitch

I have a F250 Diesel 6.5 bed and the dealer said based on his experience that we don't need a slider hitch... I guess with the curved nose on the 5ers and most of them have the extended pin box so do you agree we don't need to get the slider? He recommended a 16K husky installed for $750. He said if we really want the slider he recommends an auto slider for $1500.

Thank you,
Anna