They have the Pioneer Elite PRO-730HD 64" on sale for $4,395. The best I can do locally is $5,000, plus sales tax. I'm very leery of making such a big purchase online, though.
I think ListenUp is the best high end dealer in Denver. They are a licensed Denon dealer. I have spent many thousands there. Great customer service and knowledgable sales associates. I've never bought from them online, though. Just from their Denver storefront.