Who has this amp and can say how it is? I have now a Marantz cd 6004 cdp (much better than the NAD C545 who had too much bass for me and a too bright sound). My amp now is NAD C355BEE. Speakers MA RX 6. Ik like a darker, warmer sound. Music older rock and metal like Nightwish, Hammerfall, Iron maiden. Is the marantz amp better than the NAD C355?