I have a marantz sr6010 that is set at 8ohm per channel. It has the ability to set speakers at 6 or 4ohm. My 5.1.2 setup consists of 5xDali fazon satellite speakers rated at 6ohm and 2x Dali phantom ceiling speakers rated at 8ohm. What would be the best ohm setting for the speakers, 6 or 8. What are the advantages/disadvantages of setting them at 6 or 8. Many thanks!