Here's a short list:
Keep in mind that these things are always subjective. Bottom line: you should walk around a few of these areas during the day light hours. If you feel safe, then your OK, if you don't then the neighborhood is not for you. For more information and directions, have a look at the Trulia Neighborhood guides. They're fantastic.
Once you find the ideal neighborhood that your looking for, you can visit http://www.simongabay.com and view houses in the area. I would be more then happy to help you.