My chamber music group (violin, viola, cello and piano) will perform in several cities, and we would like to bring portable equipment to these concerts in order to record these performances for archival purposes. If we bring a Mackie 802-VLZ3, what mid-priced microphones would work best in our particular case, and should we go for the ORTF, or a different positioning system ? We would, naturally, prefer the best possible recording results with a moderately priced equipment ( around $ 1000 for a pair of microphones). Looking forward to your advice - many thanks !!