There are thousands of opinions. The more people you ask the more confused you'll be.
That's the nature of things.
Just to make a try of objectiveness:
- Sachs and B16 dampers are easy to adjust as theres is only one knob that is easy to reach
- KW V3 has separated knobs for bump and rebound, at rear to have to loosen the damper
- KW use flimpsy plastic adjustment spring seats on front
- Sachs and Bilstein use Monotube shocks and upside-down
- KW V3s are just twin-tube
- Bilstein B14: no damper adjustment (no mistakes)
- Sachs Performance offers 20 damper adjustments (B16: 10)
- Sachs: (almost) linear springs (Bilstein and KW: progressive)
There are many more track related coilovers like Bilstein Clubsport CSC, H&R Clubsport RSS
and RSA, KW Clubsport, VW Racing, AST and some more.
I'd recommend do not ask too many people.
My personal list of street coilovers:
1. Sachs Performance
2. Bilstein B14 (saves money - no hassle)
3. Bilstein B16 PSS10
4. KW V3