This is why i keep telling people to change the oil in the forks from 10w to 15w, it made a very positive difference in my opinion,and firms up the handling so it's much more stable.
I've never considered the 600 to be that bad at handling at all, in fact i've found it better than a lot of bikes i've ridden.
I'd say the VMAX was probably the most hard work for me, it was like trying to steer a rocket.