So I have a Roksan K2 CD Player, and am thinking of upgrading to the K2 amp as well. The Yamaha A-S500 is a well regarded amp, does anyone think the K2 will sound substantially better than the Yamaha? My Yamaha amp has been upgraded, but the underlying sound is not too different. Has anyone any experiences with the Roksan K2 amp/CDP combo? I will be using Mission E34 (Also soon to be upgraded) speakers. Thanks in advance.