SpeakerCraft in-ceiling speakers have been proposed for my new AV system. Specifically, my main listening room will be equiped with the SpeakerCraft Aim One in-ceiling speakers in a 5.1 configuration. The proposed sub is the SpeakerCraft X10. I am also installing distributed stereo in five other rooms and the proposal is to use SpeakerCraft CRS Ones for the inside rooms and the WS710 for the Lanai. Each room will have a volume control. My questions are: 1) what experiences/opinions do you have on the SpeakerCraft Selections, 2) should I upgrade the system from a 5.1 to 6.1 configuration (all ceiling mount, I really don't have a good room for 7.1), and 3) how much difference would it make to include the SpeakerCraft enclosures for the speakers in the main theater room and/or the other rooms (stereo only). I plan to drive the main AV speakers with the new Marantz 7400 and use an older Marantz 2265B to drive the distributed stereo spearkers with the input provided by the SR-7400. Any thoughts on the SR 7400 and this arrangement would also be appreciated. Thanks!!!