KW v2 is brilliant on the road, MUCH more compliant than the std M-Pack. I've also got non-runflats though, which also helps. I get the occassional squeek when going over speed hump, but I don't mind; it's like an audiable message that I track my car
If I was never to track I would go for the BMW Performance for warranty reasons (and it's cheaper), however KW (whichever variant) is the way to go if tracking.
KW v3's and above have the camber plates, but are very crashy on the road which is why I went for the 2's.