Another thing to consider: there are lousy schools in “good” districts, and excellent schools in “bad” districts. You really need to visit the particular schools you plan to send your kids to, to get a feel for the quality of their education.
Also – while Jane Doe may think that high standardized test scores make for a good school, Joe Smith might think it’s important to have a great music program or emphasis on writing, etc. Be sure to pay attention to the values you want for your kids along with the usual spreadsheet of test scores by district.