I need a condensor mic to record my guitar amp, acoustic guitar and some vocals at home using a Presonus Firebox. Here are the main ones I'm looking at: Audio-Technica AT2020 ($100) Samson C03 ($100) Studio Projects B1 ($100) Studio Projects B3 ($160) I don't have a lot of money to spend so please don't tell me to save for a Neumann, etc. It's not going to happen. Any thoughts about any of these, or other recommendations, based on the intended use? Thanks.