Well, the Si is weaksauce. Way softer than the other two.

Now, the FP Package is worth the $4600, if you can afford it. R&T called it the best handling FWD car they've ever driven. You won't need any more suspension mods, believe me, and it comes with beautiful 17" rims and sticky tires. Plus, it's all waranteed for 4 yrs/50k miles! If you can't afford it, I think you'll be plenty happy with the Type-S version