Re: 97a Spitfires - I’m a bit advocate for these wheels and I think they work great if you are primarily skating crusty asphalt parking lots and busted streets somewhere near to or north of the 45th parallel. They are slower and they do not slide as well as other wheels, and in a skatepark or on smooth cement, they often lack the satisfying bark you get from sliding. The primary advantage they offer is that you are significantly less fatigued skating for hours on the shitty ground.
So if this is a concern for you, as it is me, get these wheels. Otherwise, 99a-101a will do you well.