IMHO the best viewing seats would be upper deck near start finish line across from pits. Take a radio with an ear plug so you can follow on local station. All but impossible to hear the track PA system. Too much backround noise.
As many of you out there, I didn't buy mine as an investment either. I bought it to drive it and enjoy it. It is a marvelous elixir and every time I take it out it makes my 83 year old body seem young again!