Welcome aboard man! I am also considering the YJ swap in my Sammi. The 33's rub even after the SPOA. Although I've never driven, much less ridden, in a Zuk with YJ springs, I've heard nothing but good about the ride and flex you'll see with those springs. I'm not sure what you mean by unbiased. All I can tell you is that I am planning on swapping them in as soon as I have the $$ and I've been told by a number of people on and off the forum that it's a pretty good move.