Yes, winISD is a good start. One of the things that I caught was the huge impedance spike, 150 ohms. The suspension looks well behaved, no blips in the impedance, other than a small one at 900 hz, and again at 1800 hz or so.
That is a free-air impedance curve, in a ported box you will have two peaks, instead of one. When impedance is high, current through the coil is low... so having nice large impedance peaks is good.