I will be buying my first Mac once Apple refreshes them. However, I am curious which way you think is better? It is my understanding, that is I buy a stock unit from an apple store, and something should happen to the unit, they will replace it, if it's necessary. However, if I buy a custom one from apple.com, and have a problem there is nothing a store can do (if a replacement is necessary) since it has been customized with more RAM, bigger HDD. Any thoughts? I know I'm not the only one with this quandary. As always, thank you.