Since no parents from any of these schools have responded, I will.
Attached is a list of Schools in Sacramento County by API score. Looking over the 4 schools you listed, they all seemed fairly comparable and all seem like pretty good schools.
County List of Schools
I think test scores are most helpful when their is a wide disparity among schools. The Schools in the 900's are much better than the schools in the 600's. But when test scores scores are pretty close like among these schools, what I think becomes most important is the level of parental involvement in a specfic school.
Absent better indicators, of involvement, I tend to go with average parental education as a proxy of parental involvement. Generally people with lots of education put a lot of value on education themselves. The Parent Teacher Organization will be stronger, there will be more parents volunteering at the school.
2007 API Growth School Report
2007 API Growth School Report
2007 API Growth School Report
2007 API Growth School Report
But you said you had some time before you have to make a decision and that you will be able to visit these schools. What I would look at is the budget of the PTO at these various schools and make a lot of my decisions based upon that.
I am assuming that the local schools will be facing budget cutbacks at the local schools because the state's budget is severely unbalanced. During budget cutbacks, its rare for school districts to actually cut teaching positions. Instead its the classified positions that get cut or eliminated. That means the hours of school librarian might get cut from 6 hours a day to 4 hours a day or the computer teacher, the art teacher or the science teacher all of whom teach while the primary teacher is on prep might have there hours cut or eliminated.
What strong PTO's can do is use their fundraising to make up for those shortfalls. Its not unheard of for the PTO to replace some or all of that funding that was lost. Also in these schools with strong PTO's often you will have parents volunteering in the schools to take over that position. If aids were cut in the reading or math programs, parent volunteers will step up to replace them. The mom who is the engineer volunteers to take over the science classes that were dropped by the district - that type of stuff happens too.
You said you will be able to visit these schools, when you do ask about the budget of the PTO's and ask if they are keeping track of how many hours have been donated by the parents to the local schools. My hunch is that the school with the biggest PTO budget and most number of parental volunteers will be the best school for your kid.