Can I ask why the Niles amp on the front, when the Integra is going to be about the same power (even with the overhead).
I would have a hard time believing there is any sound quality improvements doing it this way. If fact; since it is a multi channel system and the center is powered differently, I would be much more inclined to believe it is detrimental to the overall sound.

I can not give you any advice on the Golden Ear FF5. But reading a few reviews and looking over the specs, it should blow that POS DCM sub away - both in output and SQ.

One more thing: Noticing the name... no RBH speakers? LOL!