You could get the 4GB RAM upgrade and stick with the 64GB SSD if you want to save money, because that will come out to $1099. If you're willing to spend the extra $100 though buy the $1199 one with the 4GB of RAM and the 128GB SSD because at that point it's $100 more for double the storage capacity. If you're buying a Mac you might as well be ready to spend as much money as is necessary.