Im wanting to lower my a5 TDI 2.0 thinking h&r springs but not sure what mm to go for 30....35....or 40 mm

im running on 19 inch genuine alloy wheels and my car is a s-line which is 20mm lower than standard from the factory.

id like it to sit level all round NOT NOSE down

any one with any pic....any info on anything appreciated AND WHAT DROP AND SPRINGS YOUR USING

I do not want it too low, it needs to be sitting above the tyre ,dont want the top of the tyre tucked under arches.....about an inch above tyres