Lowering and ride quality

venturi

Yes, I've searched the forum, but there's too much information and not enough information

I have 2012 370 roadster
I have cor forma wheels 9x20 front and 11x20 rear

I don't plan on tracking the car, but I do like carving corners, with comfort?

I would like to lower the car so that there is less gap on the fenders
But I don't want a stiffer ride, and I don't want to bottom out.

How can I lower the car (springs, which ones) so that it's lower on average 10mm to 12mm?

I also,realize tat the slightly smaller sidewall from going from a 19 to 20 rim will provide some degree of a harder ride.
I've studied the rates, the progressive vs linear, the various rates of lower front or rear, etc etc.

So, with all that in consideration,
What springs can achieve these objectives? (land speeder smooth, but corners on rails)

I've looked at Swift, tanabe, hk, tein, nismo kit, eIbach, etc etc

Lost in sea of information

Help, help

Thank you in advance
J

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2012 IPL