I am not sure how well the PH6 works with moving coil cartridges. My dealer (who does not have either a PH6 or PH8 on demo) suggested I would be happier with a PH8 for a moving coil cartridge.
For what it's worth, I also have a Fosgate Signature phono stage and I am very happy with it. It is very quiet and easy to adjust. I have thought about the PH8. The rest of my system is all ARC. But at this point I would need to hear one in my system and compare it to the Fosgate.