Hi guys, I currently have pretty run of the mill Logitech speakers and have my library encoded at 128kbps AAC. When I eventually buy a more substantial (5.1) sound system will I be able to tell the difference between iTunes Plus encoding (256kbs)? The other option I was thinking was to buy a 1TB external HDD and just archive all my CDs with aiff lossless. I guess my question is basically, does the music sound noticeably different on a high-end speaker system? Cheers, Marcel.