I am also in the market for the a new suspension solution on my 02 330cic. I am also leaning towards the H&R Touring Cup kit -- the drop from sport should be minimal. I would prefer the Koni FSDs, but they are back ordered at many vendors, they hard to even buy that option now. The Koni sports do offer adjustable dampening, which you won't get on the H&R, but I am unsure what spring to mate with them and is best for the convertible. The Vogtland cup kits also look interesting but I cannot find published spring rates (The JR kit is cheap). On the low end coilover side I have been considering FK and CX Racing.
2008 BMW 535xit Premium, CWP, Nav
2012 Jeep Grand Cherokee Laredo 4x4
95 e36 M3/5spd, 96 328is/5spd, 97 540iA, 98 528iA, 01 X5 4.4iA, 03 325xiA, 04 530iA, 92 325iA/S50, 02 330Cic/5spd