Best options for new LV 1.3 MHz

[effers]

I want to buy model 23866RU, but not sure on options (if any) I should get at purchase time. It comes with 8 cell battery. Do I need a spare battery, and if so, which one? Which is the best warranty? I will be in Boston at college, far from home. Does the X40 come with the same software bundle as the T42?
Is the protection Plan a good choice?