New sono check for down syndrome?

I have the sonogram today for that new test that they perform. My Dr. says it's standard and one of the early tests to check for Down Syndrome. Alot of people are saying that women get alot of false positive's and then get worried for nothing. I looked up online and it shows that the false positive rate is less than 5%. Do any of you think it's a bad idea to get these tests and just leave it in GOD's hands or is it good to have just to know. Also since they are doing a sono will I get to have more pics of my lovely baby?