Hi all, Back in January I bought a Denon X4200W and have been massively impressed with it so far. I am currently running a standard 5.1 setup but soon will be buying a house, so I want to go down the Atmos / DTS:X route and I go to either 7.1.2 or 5.1.4... I currently have a Monitor Audio Bronze 2 5.1 kit and I'll be adding either: Two more Bronze FX speakers and two CT265 ceiling speakers for 7.1.2 or Four CT265 ceiling speakers for 5.1.4. Obviously I will need an extra amplifier to power the extra two channels so I have a few questions: 1. Would either the Denon PMA-520AE or PMA-720AE amplifier be suitable for driving the extra two channels? 2. I've read it might be better to run the front left and right channels from the additional amp... What is the advantage of this? Or would it be better just running the additional surround / ceiling speakers from the amp? 3. In a room 15' x 12', (with 120" screen) would it be better to go with 5.1.4 or 7.1.2 for a more immersive sound experience? 4. Would the 3.5mm "remote input" trigger work with the X4200 for switching the unit on and off with the receiver?