This is a pretty solid list! Obviously you have done some reading, so kudos to you. A few thoughts:
Does the reptarium have an optional drainage tray? You'll probably want that if it does.
Get the Little Dripper instead. The Big Dripper is giant.
Don't use the moss. It just makes a mess that's hard to keep clean once it's wet.
Get two extra vines, like the Exo terra jungle vines.
Is the zoo med thermometer digital or the dial kind? Get a digital dual thermometer and hygrometer.
Get a timer surge protector for your lights. I have the zilla one, it works fine.
Also buy pure calcium with no D3 and a multivitamin with D3. But the smallest container. Supplements last a long time.
Get a pair of those long tongs if you have issues touching bugs (like I do, lol).
Other than that, I think you're good to go! You can get started with what you have plus the supplements, then add other items as you can. It would be nice to get everything ready for your cham first - check the shipping and see if it makes any difference if you order them separately. It might be the same.
When you're ready for an automated misting system, save up for the MistKing. Don't spend your money on the cheaper ones.
Post photos when your baby arrives!