I remember as a kid I had a Tasco 60mm refractor from my dad... I was reading the manual and in it it said "...and yes, you will be able to see the rings of Saturn through your telescope." I got very excited and couldn't wait... when the day came, I saw it.. first looked like a squished star but at 128X it was a tiny "Saturn" with it's rings clearly visible... Saturn was tiny but I loved it and kept on coming back for more.....
As far as seeing the Cassini division, I didn't actually see it until I got the 8" SCT... to date, still gave me the best view of Saturn.... I think you should be able to pick-out the Cassini division and perhaps a cloud band during the clearest, stillest nights.