Maybe it's just me but before you put all this money into suspension, I think you should upgrade the wheels and tires first. Then at least the brake pads.
The P-Zero Nero tires suck on the track. Ask me how I know.
In general I agree with you, but she does need new shocks so I am using an opportunity to upgrade to better parts. Brake pads are updated (Hawk HPS 5.0).
But how do you know about tires?