Its the classic risk adversness question. Its your call. If the unit is bad on delivery or 3 months after you receive it, you will be kicking yourself in the butt. Or maybe you will be able to enjoy your unit for years and years plus take your girl (or guy) out for several nice steak dinners.
I purchased my 2801 unit off of an un-authed dealer online about 4 years back, and I have not had on issue. But, I also made sure the retailer was going to honor the warranty, and they said yes. If the unit had problems, I would ship the unit back to them, and then they would send it on to Denon. I was content with that since I saved a couple 100 bucks too.
Unless the retailer you are going to buy from is willing to shoulder the burden of the unit if its bad, I would not take the chance. You could be stuck with with a non workable unit just to save some money.
Just my two cents.
Lonwa