I am beginning the process of looking for an air rifle to keep my garden free of rabbits. Several criteria come to mind and the knowledgeable here may add others. Range - 30 yards or less. It needs to be quiet. I want to minimize the potential for ricochets (which I assume is more pellet composition consideration) since we have lots of rocks around, accurate, relatively easy to charge and operate, and moderately priced (up to about $400). Which rifles should I consider? Thanks.