75X magnification is all you need to see the bands across the disk and even the shadows of the moons as they transit the planet. But yes, you need a scope with decent optics. I use this:
http://www.netaxs.com/~mhmyers/camera.html#FS
Thanks, but I meant to actually see the moons moving before your eyes it would probably take very high magnification and a very good scope.
I’ll check out the link in a little while.