I can not comment on the E60, as I have never tried one. But I own a G70 and a Tyros 2 and the Roland has a more natural sound than the Yamaha, for sure (to my ears, which I consider to be in good condition as I still can ear differences in sound just by changing the cables in my stereo Hi-Fi system).

Even with the SA voices on Tyros 2, I prefer the sounds of G70, which I found more natural.

To me, the biggest advantages of Tyros 2 over G70 are the style availability, Multi pads and Registration Memory (more versatile than the user programmes).

On the other hand, the G70 allows the complete style edition (not only the drum set, but also the instruments within the drum set, which I donīt think my Tyros can do) and I am now learning to use the built in Midi to Style function and I am sure we can find the appropriate style for every song we want to play.

I donīt think I will let go from home both the Tyros 2 and the G70, but if I couldnīt afford the two, I would stay with the G70.

Just my two cents.