Thank you all for your replies.

Any brand and source recommendations for the slotted rotors and lines?

Incidentally, I run on Eibachs and Bilstein HD shocks and am happy with their overall effect on vehicle dynamics, including braking.

Also, should these slotted/drilled rotors be paired with performance pads (and which ones)?

Finally, I'm not sure I understand how new lines would change the ABS cycle frequency, although it may improve efficiency.

Thanks again,
Nick