Randog and others,
As an option for pre-amp, I highly recommend you look at the BentAudio NOH preamp. I have the TX102S which is internally identical to the NOH.
It is very neutral, wide soundstage, extended bass. Go to the BentAudio circle to read more about it. John Chapman's service is incredible as well.
Another advantage, the BentAudio is passive transformer based. It supports balanced inputs/outputs, and can have a remote control.
Good luck,
Al