I bought the base 15" at the Apple Store yesterday. I wanted to get the high-res display but I was told that is only reserved for the high-end models in-store. So I settled and got the standard res. I took it home and played with it for a day and now remember why I wanted the high res! So I just placed an order online for the same model, but with the high res option. So my question is will it be okay to keep the original mac until I receive my BTO one then return it? I really can't be without a computer for that long.