[musictlk] Yamaha Voices

[Marion Gwizdala]

Dear All,
    As I wrote in an earlier post, I am considering purchasing a new keyboard for our church. We are considering two Yamahas - Models 640 & 535. My understanding is that the only difference between the two models is that the 640 has weighted keys. Does anyone know these instruments and could comment on the quality of the voices and any other differences between the two models. All input is welcomed!

fraternaly yours,
Marion Gwizdala