H&R OE Sport Spring Set
Front and Rear Fitment
Ride Height: Minimal Lowering
Note: Avg Low .25"F .25"R
http://www.tirerack.com/suspension/S...track&x=65&y=9
KYB GR-2
http://www.tirerack.com/suspension/S...mium&x=62&y=21
If you want to go more radical than this, then you're going to need to go to performance struts capable of handling the set-up, etc.
We're putting adjustable Konis with Ground Control coilover kits on our Miata for Autocross. When you do something like this, then you're starting to get into the more serious suspension set-ups. The Ground Control coilover kits are cool because you can adapt them to the shocks you have enabling you not to have to pay the $1000-1800 for a full coilover system. Plus, the Ground Controls use Eibach springs and allow you to order them in increments of 25lb for the compression rate. It's a very nice set-up. Now, it's off to the alignment shop....