Recommend you do a search on the TriCities forum, there are a good number of ppl asking same or similar questions on moving to the TriCities area.. I do know that North Richland "Horn Rapids" is a nice area to live and South Richland. You can also contact the Chamber of Commerce and they should have literature to send you on the community, be it Richland, Kennewick or Pasco...
I furnished the url site for the TriCities Chamber of Commerce, they have been helpful when I needed them a few years ago.

PM is I can further assist ...
Welcome to the Tri-Cities and your Tri City Regional Chamber of Commerce