great , thanks for that. the problem with my current system is that some music sounds ok and other stuff sound's just ok but nothing special! i was thinking about auditioning the rega rs1 bookshelf speakers, but my gut feeling is telling me to go withh the roksan upgrade because i basically want to power my 685's to the best of their potenial. in your opinon, what will the sonic presentation be if i do plump for the kandy k2?