If you had some ridiculously high spring pressure for your combo,you could change springs. In your situation,you're right in the ball park. There is no good reason to change them. The springs you have are one of the hand full of spring options that are ideal for your situation. If you purchased springs from another manufacturer,that would also be right for this situation,you'd just have a different set of springs that would also be ideal for your cam. It would be neither better nor worse.Is there a good reason to change valve springs and hardware for less pressure,
The key is to set them at the proper installed height.