I can only speak from experience. When in a recording studio, never has a technician ever used a condenser mic with any recordings that I have ever done. Ribbon mics seem to be the preferred product
Mic placement depends on the space. Often the tech will listen in his booth and readjust from time to time. We need to be still when we play. They usually mount the mic a bit above us pointing down. If its one mic for one person it'll point towards the bridge so to speak but not that close to. I guess an average of 2 to 3 feet away from.....
I think having the best mic will prevent your recording from being thin/nasal. The best quality mic will pick up the closest to reality sound. Sometimes that is nasal