Intrax drop lower than the competition. Here is my opinion that I worte on my website a few years ago:

My Suspension Combo DEC 2007:

This suspension set up is the best in the industry for the money. The shocks are adjustable to your driving needs a comfortable ride in the city or a stiff racing characteristic. The springs are less expensive than eibach and it’s a lower drop.


KONI SPORT: Are adjustable, which means that you can influence the behavior of the car to meet your preferences (ride comfort, handling balance, etc.).
Koni North America - ITT - Sport
Koni North America - ITT
Why the industries first adjustable shock is still the best:

• Big handling improvements
• Reasonable ride quality
• External rebound adjustment on most cars
• Best KONI shock for all lowering springs
• Re-buildable and re-valveable for custom vehicle setups
• Yellow exterior finish
• Lifetime Warranty

And
Intrax Coil Springs:

MakeModelYearPart NumberTypeChassisFrontRearLbsList PriceChryslerCrossfire V-604-28.1.025SLS
1.4"1.6"
variesThese Springs Are Cold Wound To The Most Exacting Standards, Stress Relieved And Shot Peened To Remove Surface Imperfections Extending Service Life Up To 200% Or More, Springs Are Also Phosphate Coated For Corrosion Resistance And Powder Coated To Ensure A Lifetime Of Outstanding Looks, Includes Manufacturer's Limited Lifetime Warranty
http://www.intraxsuspension.com/prod_springs.html