Yeah no. All computers sold at Best Buy come with service plans, not replacement plan, and they certainly don't even HAVE to give you a new one on the Replacement Plan. What I would honestly do, and I say this as an employee: buy one if you need it now, but get the accidental service plan. A few weeks after the new Macbooks come out, accidently drop your Macbook so hard they can't fix it; they'll give you a new one.
Seriously, if you can wait-wait. It's been said a hundred times before.