I have considered upgrading my current amp NAD C326BEE to more high-end amplifier, Peachtree Audio Nova 300 in particular. What should I expect from such an upgrade? Will there be notable (worth 2500 €) advantage in the sound compared to my current NAD? I'm especially concerned about the sound imaging, clarity and punchiness at high volumes. I have Aurelia Saphira high-end speakers.