Really need a rMBP in the next week for work, looking at the higher-end 2.3GHz with Retina display. With WWDC coming up in slightly less than a month, I understand there might be a chance of an updated model. Working in 3D and video editing, even a spec bump could make a difference, so I'm curious if anyone has any experience buying such a device so close to a launch. Apple officially states a 14-day return policy. If I purchase from the Apple Retail Store on May 6th, that gives me until the 20th. Does Apple provide some type of unofficial "leeway" for an exchange when an upgrade occurs, likely within 30 days of an original purchase? Thanks in advance for your feedback.