I have three questions regarding the infamous Yamaha NS-10's. 1. What exactly is the difference between the NS-10 and NS-10Ms? 2. Which tend to be the pro studio staple. 3. Since the only option is to buy these used, how does one go about buying them via ebay, etc. while making sure that they're in proper studio condition etc.? Umm... also I know a lot of people have very strong opinions about other monitors, but to keep this thread short and sweet and to the point, it's probably best not to mention them... By the way, this is my first post with recording.org. so if i've placed this question in the wrong forum or not properly searched for previous threads to answer these questions, please forgive me... thanks.