Wow! Who knew! A true miracle in video engineering! Soon I will be able to blow up my cell phone images to rival that of high end Canon and Nikon DSLRs. On a more serious plane, I am thinking of getting a Denon, and Link to sales blurb gives specifics of a 7.1 model, refurbished, that seems much more current than the 5.1 model, linked on the left side of that page. I really don't need or want 7.1; 5.1 is more than enough for my needs. Any thoughts on the relative merits of these two?