EQ7 has a lot of new features, not the least of which is the ability to easily add your own fabric images, and it's a lot easier to manipulate those images.
EQ7 is a MAP-controlled product, that is, sellers are not allowed to advertise it at less than the Manufacturers Advertised Price.
To get a deal on it, you need to find a dealer that will sell it at less, or whom offers rebates on it. Online is your best bet.