I currently use my nokia 920 phone which from reading gives amazing audio quality to my headphones. Denon D2000 + Sony MA-900 Someone has offered me the Colorfly C4 for £350 delivered and I am considering buying it. As I am unable to test it I am unsure if I would notice much difference over my nokia phone and Fiio amp? Your thoughts? I plan to listen to Flac or uncompressed Wav audio Thanks!!