If you want my truthful opinion, I would go for the angiogram. This is because of two things. First the there are risks, but driving a car carries risks, as does crossing the road. Life is full of risk. However, the risk for Angiogram is tiny. Let's say you go for the CT-64 slice, which my Cardiologists have all hated, and they find that there is a blockage which warrants further investigation, you will still need an angiogram after.