I've been using an AKG C 1000 for recording saxophone (tenor, alto and soprano) and not satisfied. In fact I just tried an old cheapie Fostex M7 an it had a cleaner brighter sound! In researching the world of cost effective mics (under $300.00 or so) it seems maybe I should just find a Shure SM57 and go with that? The 57 seems to come up in everyone's discussion of what mics are used in stidos from pro to home based. These things have been around for what ... 50 years? Have their specs changed at all since they first came out? Is there any merit in finding an old one (not beat up) over getting a brand new one? Or is there a substantial difference in the newer mics, like AT 2020 or Shure Km27(?) or mid range Marshalls over the 57's?