My first Tesla was a 2016 S75D, so a little more range the X75D. That said, If you charge up to 80-90% each night, you will be okay. The only time you should have range anxiety is when you have very cold weather move in, which should not be too often in your area. A potty stop at a Supercharger and you'll be on your way (you did use a referral code for free Supercharging, right?!).
Extreme cold can reduce range up to 50% (or more).
If you switch to a 100, another advantage is that it charges a little faster at Superchargers. If you can comfortably $witch to a 100, you will have no regrets, though I don't think it is necessary at all.
Since you are buying an inventory car, you can also consider travel to where it is and pick it up. You do need to evaluate the sales tax consequence though (example, FL charges same sales tax rate as home state for out of state purchasers and MA charges full sales tax to ANY purchaser).
We picked up our first [inventory] Tesla in West Palm Beach, FL and had an awesome trip home to NH (no sales tax in NH, therefore, no sales tax in FL!). Second Tesla (X100D) was an inventory car in MA, which was delivered at no cost to next door NH (avoiding sales tax).