There is good and bad in the SFV.
If you are interested in crime you can go to the LAPD website.
Generally speaking, I would suggest if you are raising kids to either go to Santa Clarita Valley or Simi Valley. Simi Valley will result in less traffic.
Price range would have helped in this question.
Areas like Calabasas in the SFV are nice. but close by in Canoga Park is a place I would try to avoid.
I am sure there are more factors like work and other social activities.
I suggest you do a few weekends in the towns you are considering if you can.
When you get it narrowed down get the whole family to check it out for a weekend and a weekday.
Harold Sharpe - Broker
So Cal Homes Realty
California Department of Real Estate License # 01312992
Please check out my website and feel free to use the MLS search feature available. No obligation of course but should you have any questions I am available to answer them. I have lived and worked in the SCV since 1978!
Good luck on your move!