Upgrading from 14 pro

I’m currently on Go5G plus with an iPhone 14 Pro and I’m wondering about upgrading. My options are - Upgrade to 18 pro for $700 trade in (cost: $500) - Upgrade to 17 pro for $830 trade in (cost: $270) - wait for the 20/pro and hope that tmobile still has a decent offer for 14pro/Go5G plus What are your guys thoughts on the value proposition for the 17p vs 18p? Also, does anyone know if Sam’s Club is currently doing any offers? I know they have the waived $35 DCC right. Thank you!