Jerry,
Welcome. A couple of thoughts. If you are looking to buy a TV, you may be better off locally. If you run into problems, service/repair/replacement are much easier animals to deal with when you can talk to the store manager.
A far as the Denon 3805 goes, you might consider looking at their website and finding their list of authorized dealers. If the dealer isn't authorized, they likely won't honor the warranty. Then you have a choice to make - buy it new or buy a refurb. ecost is an authorized Denon refurb etailer and the 3805 shows up for sale in cycles at pretty good prices.
Another source to use with Pricegrabber is
this one , which does a good job for prices and reseller ratings.