I have a 57, 58 and Beta 87, and get good recorded vocals with each, but still have this lingering thought that the SM7b would be the a great addition to the ole mic cabinet. Seems like it'd be the kind of mic that I could just leave up and use for just about anything/everything. I do however usually resort to a LDC for quieter vocals, but for the basic rock stuff and louder singing, my thought are that the SM7 would be a win-win. However, given that I have the others, will the $350 be better spent elsewhere? In short, is it going to give me results that are different enough from it's Shure siblings that would warrant it's purchase? Thanks.