I've heard of people buying a new Mac and then a new model comes out like the week or so after, and they are able to return it any buy the new one. Will this be possible. I just ordered a build to order imac with custom options, and if there should be a new imac release within the next month, will I qualify to return my existing imac and get the new one. I know there's a certain time frame that you must fall in to qualify.