Having had a 6500 and knowing the 6900 very well, I have to say it does seem like the 6500 has more power, and is more dynamic. We used the 6500 for a while with Revel F30s in a room that is 35x18 and it was crazy how the 6500 had zero strain at very high volume levels playing techno.
Give it a try for a while and see if you think you need more power. It really depends on what volume level you like to listen to as to how much power you really need.
Arthur
Give it a try for a while and see if you think you need more power. It really depends on what volume level you like to listen to as to how much power you really need.
Arthur