I'm also about ready to pull the trigger on a 3808 and wonder if the 2809 will have any advantages and most importantly sound as good as or better than the 3808. The features mentioned above are not important to me but I'm sure others will find them useful. I compared the 2808 to the 3808 for about five seconds and as soon as I saw only two HDMI inputs on the 2808 I moved on. But the 2809 now has four so I want to fully understand the differences before I make a decision.
I'll most likely be going the Dakmart route again, I've had no issues with my 3805 I purchased from them almost four years ago, and the price is similar to what the street price will be on the 2809.