Hey guys i was wondering what you guys though about my setup and where i can improve on my source? Right now i have a B&K Reference 10, Marantz Model 170DC, Polk LSi9's, and i am using my iMac as my source i am going from the iMac to the B&K with an Optical cable. I know i can do better and i would like to get a dedicated CD Player eventually but i am asking what can i do to improve the iMac as a source cause that is what i use alot cause i love having a music jukebox with everything i own on it. All music is in Apple Lossless format and sounds pretty good. Now i am wondering should i buy an external DAC for the iMac or an external sound card? What are your guys oppinions. I have a Thorens TD280 turntable with a Shure V15 Type IV for when i really want good SQ. Any reccomendations on what i can do to improve the sound quality from my iMac would be great thanks.