Hi, I'm just starting out and want to exclusively record solo violin. I wondering if it's better to record it in stereo or mono? Considering that I'm just starting out, would it wiser to spend my dollars on a better quality mono setup or a lesser quality stereo setup. Thanks. p.s. is it possible to buy one microphone (ie. AT4051) and then buy another down the road to make a stereo pair, or do I have to buy them matched together?