well... yes my car is modified. s15 sr, kyb agx with Tanabe gf210 springs, sway bars, q45 brakes & rx7 wheels with 225's front and 245's rear. Of course other mods too but those are the mods which would most directly affect tire choice.
I
do get on the brakes pretty damn hard sometimes... it's just not repeated over and over in a matter of seconds like it would be on a track. And its an s13, not a 300zx, but the front tire IS the size of a 300zx which makes me think the FK might have adequate traction for some heavy braking. But please tell me if you disagree.
Turn-in feel is important to me. That said, i would rarely take a curve on the street at 10/10ths pace like i would if i were on a track. Maybe 8/10ths happens from time to time

So, it's more turn-in
feel that i'm concerned with than ultimate turn-in
grip.
About the rate of wear, i just don't care. I don't put too many miles on my car and even z1's would last me at least 2 years (on the front anyway). However i do care about the price of the tire itself, which perhaps is skewing my judgement toward the FK452. I just don't want to spend the extra money on z1's if i'm gonna see a negligible difference for my application.