I have the 6600 and love it. But thought seriously about spending the extra money for the 7700, luckily the sales lady was very knowledgable asked me what my plans were and suggested I go with the 6600. I had 6 months to change my mind to apply all of my purchase to the up grade. I didn't do it.
So if I were you, I would thank your husband and totally enjoy the new machine. They are both great machines.