Don't Wait if You Find a Great Deal Today
One reason to buy the iMac today, instead of waiting for the 2019 upgrade, is to get a good deal on a model today.
Best Buy is discounting the iMac and you may occasionally see them offer up bigger discounts for students like they do with the MacBook Pro.
B&H Photo offers deals on the iMac, which allows you to save big on the current models. Plus, they don't collect tax outside of NY or NJ.