I wouldn't say so. Masaaki Suzuki's performances of those Bach Cantatas are superb. I have a few of those myself, but not the complete collection. I already have 3 complete collections of Bach Cantatas (Gardiner, Leonhardt-Harnoncourt, and Karl Richter). I will add a fourth (Rudolf Lutz) when he finishes recording the entire set.
BIS only records classical music so I think non classical listeners wouldn't know about them.