Have anyone use the audio tech condenser mic, AT2020.Im planning to get this one for my home studio,for vocals.But at the same time,someone will be giving me a ShureSM58 for free.So,i need yo help.Is the SM58 better than the AT2020?If not,should i get the AT2020?If it's better,than i can cancel my plans of getting the AT2020. :???: