Recently, I listened with enjoyment to Bach's six Brandenburg Concertos played by members of the Philharmonia orchestra conducted by Otto Klemperer. Going back even more years, I now really liked the six concerti as played in 1935 by Adolf Busch and the Busch Chamber Players. What Bach needs to be convincing is love, a sense of rhythm, a sense of style, and musical intelligence. Harpsichords v pianos, flutes v recorders, baroque violins v modern violins really do not matter, since Johann Sebastian rarely wrote with precise sounds in mind (unlike, say, Debussy or Mahler). Busch is great and fully  deserves his high reputation over 70 years on. EMI has done well to reissue the Brandenburgs (plus the four Suites) in new transfers in its Great Recordings of the Century series. Three classic CDs for all time and all ages ... pace the Baroque Brigade.