I have a buddy that owns a 570 4x4 with electric power steering. Its a nice ATV but he has had some issues with it. he had a problem with the upgraded wheels that wrecked his tie rod ends( that was a dealer issue). He also has a major problem with the CVT transmission when it got filled with water, they tell him it needs to be cleaned every time you take it in the mud.
If it were me i would buy a Honda, another good friend of mine has a Honda foreman with power steering and the DCT automatic and he has had not one issue with it and it has a lot of hours on it.