The G 70 is a very nice unit. The solo sounds are fuller and better than Tyros, better organs, accordions, the piano is superior, the drums are very powerful und even the guitars are nice.
It is very user friendly and does not take much time to work with. OS 2.0 starts in Oktober with many new feature (guitar editor, you can use SRX-Boards for the styles...).
One disadvantage (especially for European players) is the lack of styles. For this reason I work with the software "Style Works" and have converted many Tyros and Yamaha styles. Revoiced they sound very nice and some of them even more powerful as Tyros itself.
Try the G 70 by the weekend - but be shure that it has OS 1.10 and the updated styles.