Are you looking for a personal residence or an investment property?
Personal residences are fully dependent upon what you like. Schools, neighborhoods, parks, transportation, location. So that's a difficult one to answer without knowing more. Personally, I live in Olathe which is in southern JoCo.
For investments (which I work with in abundance) JoCo can be very good but it's not as profitable as other areas of town like Blue Springs or Belton or other good areas.
Feel free to provide more detail so myself and others can help you better.