Setup info.
Read a few of the articles on this site for suggested speaker locations and wiring and setup information. Once you have everything hooked up, the autosetup feature on the Denon will adjust most of the speaker levels and distances for you.
Make sure that the center channel speaker matches the mains. Does the 62 Center have the same size drivers as the 81 mains?
Also, make sure you audition Klipsch and other manufacturers at the dealer like Paradigm, PSB, etc. The Klipsch horn loaded tweeters play loud with minimum power and are great for HT but they are not for everyone. Aside from the overpriced monster stuff, you have the makings for a great system.