I know I'm new to this forum, but I have noticed something which I think is very important. I see lots of posts about equipment. This is fine as far as it goes, but equipment does not make a mastering engineer. The purpose of mastering is to have a fresh set of ears, in an enviornment that is "known", listen to the finished mixes and bring them to a higher, more satisfying & commercial level. How that is accomplished does not matter. There are an infinite number of combinations of gear. If the artist/ producer/ record company/ buying public all like the result, then the job is well done. Mastering is about giving that final polish to your gem before calling it retail ready. This is why the mastering engineer is important, not so much what gear is used.