Now I own both G70 and Tyros 4 and I feel both are great I agree with fran G 70 sound is great I feel G70 sounds are much fuller and not as thin in many areas Strings, Pads, Organs, Piano and EP as well shine on G70 drums fall behing and show it era , Yamaha does not do well except EP yamaha very good SAX and solo inst styles are both good but I kinda lean to Yamaha styles as for midi file players both great so the best thing for all of us here is to have both and we will all be happy i will be at Namm tomm so I plan to go thru the bk5 and I will give a report later I like both units and feel I am at my best when I have both on stage .