<p>720 is a good enough score.</p>
<p>Stanford does “strongly recommend” 2 SAT IIs, one of which they want to be Math II (or at least that is how it used to be for several years).</p>
<p>You can take between 1 and 3 SAT IIs in each sitting.</p>
<p>Once you send any SAT score, all the previous scores are sent as well. (This is changing, but I am not sure how soon the "score choice " will come into effect)</p>