Rounds make the models look infinitely better in a skirmish game.
I usually just use the gw snippers (as they are very thin and cut flat), and carefully cut the foot off the base. Worked pretty well for when I was doing my skaven. any accidentally snipped feet I hid with flock.
Are they on with super glue, or plastic glue? If super glue, you can sometimes just snap them, or pry them off.