I'd vouch for any of the TEIN products...but if you go with just their springs, check with TEIN to see what shocks they recommend for your application. Since the damping strength must be matched to the spring rate, I'd follow the spring manufacturer's recommendations.

But if you want to play it safe (which I recommend), I'd go no lower than 2".

If you're much lower than that, a savage pothole could lead to the suspension bottoming out. :eek3: When rims bend due to impact load, the root cause is usually insufficient suspension travel. Keep that in mind. As you reduce the amount of suspension travel through lowering, you have to increase damping and spring rates... it's the only way to control the shock absorption process given the remaining distance.