@Crumb
Possibly...
The whole 60Hz thing was something brought up by some other guy who discovered that when his AGA / GFx card were both operating 60Hz, all graphical operations suddenly bacame beautifully synced, including stuff like solid window dragging etc. IIRC, he was using a CV64 or CV3D.
Personally, I haven't noticed any real sync problems with my bvision though, but I dont tend to use solid window moving. The mouse seems fine.