I've had my first iMac for just about a year and am slowly learning the various programs. iPhoto is nice for organizing my pictures and minor editing, but I am looking for a program where I can edit photos-- nothing major or professional. For example I have a picture where there is a rip in the subject's clothing, and I would like to clone a section to hide the rip, so that it looks like it never was there. Just something relatively easy to use and not terribly expensive. Any suggestions?