Hello. I am looking for 2 B&W M-1 speakers to serve as rear surrounds in my 5.1 system. I will be using B&W VM1's for the front and center channels. I am a cheap ***. I have been scouring ebay looking for a set of these M-1's. My question is, I know that there are 2 versions of M1's....older ones, and the 2012+ ones. I am obsessing over finding a deal on these, but all I can find so far are the older generation speakers. Am I really going to notice a difference in these 2 versions using them as just rear surrounds? Should I just buy some of the older ones, or keep looking for the newer versions? Also, how can I tell the difference visually between the older and newer versions? I am sick of asking ebay sellers, and I don't believe half of them anyway know what they are talking about. Thanks guys.