Suspension + Summer Tires/Light Wheels > K04 or Stage 2 etc.
Subjective topic for sure. We all drive our cars differently so not going to say one is better than the other.
For me, I definitely disagree as I don't track or spend alot of time blasting through turns. I've done both areas on my car so far and the Stage 2 is the one I use most and still makes me feel giddy every day. The lowered stance and better traction is nice too but much lower on the fun factor scale. Especially when I hit hard bumps or rough roads in the city.