Helix Organic. Works properly with an OEM DMF. It's what I've got, and I'm really pleased with it. Just a bit heavier on the pedal but feels very factory. It's not snappy or grabby like some other uprated clutches.
I'm Stage 2 R-Tech too. The Helix will handle 400lb/ft, so anything a k03 or k04 with all the bolt-ons can throw at it.
Ring Alex at AKS, he'll sort you out.