Huntertec when you lowered yours did you notice any major ride quality difference??
was your a sport or non sport equipped car, also now lowered do you have any problems with the 20 inch wheels, especially clearance issues on the back when you have a load in your car or you hit bumps.

my rear tyres are flush with the out side edge of the body work and am concerned that if i lower it i will get rubbing
I noticed a very slight firmer ride , as I mentioned though my only regret with the excercise was I should have gone lower at least 40mm front and 50mm rear, mine sits high at the back with no spare etc ( runflats ) which I hate no end worst thing is I don't do enough Ks to wear them down to justify throwing them although I'm considering it. Mine was nonsport originally, no problems with 20'' wheels with clearence and I'm running 11'' on the rear. Main issue is your camber setting fr/re when its lowered, hope this helps.