Well, your nightmare is only beginning because you will get many advices all of which will contradict one another and will confuse you more than anything
That being said, I am in a somewhat similar situation as you although a minor difference. I have my receiver picked, my amplifier picked, now I am getting the RS6 and its corresponding centre channel. My receiver choice I have is the Yamaha RX-V663 (for an incredible cheap price) and paired it with a Rotel 5 channel amplifier (RMB-1075) with the RS6 to come in February!! Many say that speakers are not hard to push to their full potential and a seperate amplifier is not required but decided I wanted to go that route. Rather than spending the money on a RX-V1900 which will become absolete in a year or two (as new features will come out), I figured, might as well get a cheaper a/v receiver with the pre-out and then pay for the seperate power. This way, when HDMI Y.Y comes out or whatever else comes along, its easier to justify swapping the cheap a/v for a new one
That being said, for me, the 663 had enough HDMI for what I needed, had the features I was looking and...the price was right!!.......
Best of luck


Best of luck