Which golf clubs should I have in my bag?

If I were you, I wouldn't get a 3 or 4 iron. I have both a 3 and 4 iron and don't use either. I just put them to the side. I personally like hybrids more than irons but it is all up to you. Make sure that if you do choose to get a 3 or 4 iron, you will be using it more than the club you take out.