<p>Well, you will HAVE to send your 3 SAT II's, you don't have a choice there. Personally, I would send the SAT I's instead of the ACT's. Princeton prefers SAT scores, and your SAT and ACT scores aren't that different. However, I would certainly not send both because Princeton will most likely simply disregard the ACTs. Just my 2 cents.</p>
<p>Also, when you send your SAT IIs, your SAT I scores are included. Your SAT IIs are very strong, and show more mastery of the subjects than ACT subscores.</p>
<p>Finally, Princeton does not look at ACTs unless you haven't taken the SAT I. Check their common data set.</p>