I know the common thought these days is that newer SM57s vary greatly in their quality and tone compared to more vintage models. I own two, and have owned two for close to 10 years now, and they do sound like practically different mics. I have one labeled as the good one and one as the "bad" one. I'm thinking that maybe even my "good" one isn't as good as some that are out there, but what's the easiest way? Is there a site or something that sells known "good" SM57s? Or is my best bet just to order 3 new SM57s from Sweetwater to have 5 total and do a mass shootout to find the best sounding two?