I have the FK452's now, and they are pretty good however they get slicker the more wear on them. Got about 20k out of them max which is about right for the Z. I think I will go with bridgestone re760 sport, re050 pole postion, or michelin pilots A/S for a daily driver next. The FK452 just didnt impress me. Ive heard nothing but bad things about the BF's for daily use (super noisy) I see your in TX which has similar climate to me here in FL. Of your 3 choices I would go michelin despite the money. You get what you pay for.

 

BFG Gforce all season, i have a set on my back right now. Very sticky for the 400 tread wear, probably much stickier than the 452's. I also have 25k on them now 60% tread left.

 

You would be hard pressed to beat the Pilot Sports in any catergory although the Conti's mentioned earlier are a great second choice. The KDW's are not an A/S tire,
they fall in the extereme summer tire category.