Quote:

... I was told smooth is the word when it comes to secondary operation....



You were told wrong. If you are trying to maximize performance, you can only determine the best spring at the track. The springs that generate the lowest et, best mph, may, or may not be smooth on the street. Weight, gear, and converter play a key role in what springs are best, and whether or not there will be a sag when they come-in on the street.