Zig Zag man? What are you talking about? That's an actual photograph of me!

OK, so I'm loking at the Denon page and I come across this: http://www.ecost.com/ecost/ecsplash/shop/detail.asp?action=detail&dpno=199034#scroll Now this looks like it has everything you all have been talking about, AND it's cheap... errrr... INEXPENSIVE. What am I missing? Please tell me because I'm ready to press the buy button.

Also, I know this is a whole 'nother trip, but what is 5.1 vs 6.1 vs DTS vs DOLBY Digital vs Pro-Logic II ( Pro-logic I has already become obsolete?) and so on? Am I going to buy a receiver today that won't play the DVD's of tommorow?