Questions regarding Sunfire Cinema Grand setup

I just purchased this amp, and I noticed I have the choice of hooking up the L and R mains as Current or Voltage. It is my understanding that the Current setting, will provide a more "tube-like" sound, which intrigues me. My concern is that I don't have this option for the center channel.

Does anyone know if I use the Current settings for my mains, would it sound strange for home theater, since my center speaker would be setup as Voltage.

I am assuming that it was designed this way because in a movie setup, you won't notice the difference, whereas in two channel, you can go with whatever setting you like better.

Does anyone have any real world experience with setting this amp up either way?

Thanks
Greg