Suspension/Lowering Kits?

Hi,
I'm new to my mazda5...and I love it. It just seems a bit "boundy" when in curves. I'm sure its because its a "tall wagon". Also, it seems that the springs are bit progressive in nature? I was wondering what suspension upgrades are available and where and how they affect the ride vs. improve the handling. Also, how low is too low on this thing?
Thanks in advance...
Drew
 
I found some H&R springs, but haven't looked enough to find out where to buy them. The Tire Rack carries H&R, but they don't have info for these yet. There's a dude in another thread from Vegas that has those springs. I think 1.3/1.4 inch drop.
 
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