Got the Yellow Bilsteins installed couple weeks ago with KYB RD5460 and RD1613, I'm pretty happy with it.
They are only a little softer my my coilovers were, but you can feel the quality is higher.
Rebound is much more controlled. I mean the wheels doesn't kick back that violently on certain bumps/imperfections on the road.
I can/could take speed bumps faster now.
I suppose it would be the best to drive it on 15's, but that's not gonna happen.
As for fast cornering, I'm not sure yet because so I also got new tires (from Conti Prem Contact 6 to Bridgestone Turanza T005) and I still have to find the good pressures for these new tires. (Currently 1.9bar front and 2.4 rear)
Not to mention these new tires are XL and the previous were not. So there are many variables.
Body roll is a little more than it used to be, but that's expected due to the softer KYB springs and higher ride height.
In fact the front are pretty high still. 17's in the rear and 16's front doesn't help either with arch gap. Eibachs are on the way

My addition of DIY spring insulators also raised it by 2mm
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With absolute 0km in the front. There rear springs already had few hundred kms in them at this stage
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Front height dropped a little since, so its more acceptable.
I will definitely change the front springs, but might leave the rears as is. I want equal height/arch gap front and rear.
Also tried a 5mm spacer on the rears and I really liked the outcome. With these KYB spring it will be no problem to add spacers. Got the longer studs, I will install them along with the spacers in the near future.
With 5mm spacer:
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Without spacer:
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Cheers