That's exactly how I felt last year...I really wanted a Plus sized X. And I told myself that I would wait at least another year before moving on to the new 'Max' X(s).
But, I choose not to wait. I paid off half of my 'old' X, so I'll be returning that to Verizon and starting a new purchase (2-year) of the Max. All in all, I spent $622.50 (50% of full price with NY tax) to own the best-in-class phone for one year.
You may argue semantics (since to fully 'own' the phone I would have needed to pay off the loan balance of the same amount so that I could sell it for around the same price). Since even the 256GB X used models in 'mint' condition have dropped to between $750-$815 in sales over the past few days. Sure, if I paid Verizon the balance, I could then turn around and sell my phone to make maybe $125 after fees, shipping, and insurance costs and further reduce my one-year cost of ownership. But that would take time, haggling, and always the concern, will this one be the buyer that tries to burn me and claim I shipped them the equivalent of a box of rocks instead of a mint phone! It has never happened to me, but it does happen to people. All in all, I receive a generally similar benefit as if I had bought and sold the model after one year. It just costs me a smaller amount more in $, but less in time and concern.
I digress! This phone I will keep for 2 years (at least), unless I exchange it for the more diminutive Xs model. But, I think I will be happy with it!