Hi Michael,
You have some great dining choices there but I'm afraid without knowing what you intend on eating that I can't fully make the decision for you. What I suggest you do is visit
www.allears.net and look at the WDW menus in the dining section.
Some of your choices have set prices such as your Crystal Palace dinner will cost $28.99 per adult, Garden Grill is $28.99 per adult, Chef Mickey's is $29.99 per adult and Tusker House at lunch is $19.99. So out of those 4 you should pay for Tusker House out of pocket as it is the cheapest.
I've had a look at the menus of your other choices and the average entree price at 50's Prime Time is about $18 and at Tony's is $13, plus the price of dessert and a drink. So if you intend on eating dessert I definitely think your lunch at Tusker House will be your cheapest meal and the best meal to pay for out of pocket.
I hope that made sense and you have a great trip,
Jo