mine handled worse when at its lowest (100mm + drop) loads of understeer and zero clearance - but it looked awesome.
If you wish to improve the handling go for a ride height of between 30 - 50mm lower than standard, and add a decent set of anti roll bars.
things will obvously be affected such as vibration levels and ride comfort, but this really depends on what you wish to achieve from your car?
My advice would be buy the best set of coilovers you can afford, and experiment with ride heights.