We agree, #200 and #202 are the strongest.
#200 - we think it may be a bit too simple. We do want to go for something very simple, but this might be just a little too simple. Maybe adding a texture or something to add to the waveform aspect of it may help.
#202 - we very much like that it conveys the waveform clearly and that it is also subtle in its resemblance of the letter N. however, when looking at the logo as two Ns we feel that it does not come across as refined or polished as we would like. We think shifting the waveforms could potentially help, maybe cross crossing them, or some kind of variation to have it work when both viewing as a waveform as well as two Ns.
Thanks!