Formula 1 Circuit of the Americas ticket suggestions?

My son and I will be attending the Formula 1 race in Texas in October, has anyone been? Any suggestions on which grandstands would offer the best view of the circuit? We are leaning towards turn 15 or turn 19 grandstands. Tickets go on sale Tuesday

I went a couple years ago and sat in the grandstands at the 3/4/5 complex.  There was a big-screen right across the track from us so we could actually watch the race, which was nice.  For the other sessions, we wandered around the track and it seemed like the grandstands at either 9 or 10 at the top of the hill there would have been a pretty good view as well.  We sat on the grass at 16 for one of the practice sessions and it was okay, but I don't think I would have wanted to watch the race from there.