I am getting ready to buy a MacBook Pro as a Christmas gift. I am struggling with when to buy and which CC to use. I have the Chase Sapphire Preferred, Ink Bold, and SPG Amex. I think that the Amex card will give me a additional year of warranty, but I remember someone saying that they received 10X the points from Best Buy last year on Black Friday for using their Bold card. 10X would be over 10,000 points and that sounds hard to pass up. Any suggestions. I am a newbie and would appreciate your advise!!