I've been on these tires for a total of ~17K miles and 6 track days. I'm definitely inclined to agree with the forum opinion of these tires being the best all-around performer for the Z34. Below are some thoughts:
Sizes: 265/35R18 | 275/35R18
Front Wear:
Rear Wear:
Daily use: These are VERY good tires for daily or even "spirited" back-road driving. It does not take any time for these to go into their "working window" as I've had no grip issues. The wet traction is also outstanding, as I've been able to survive the ridiculous downpours in Houston without any drama. The ride quality is good for the sizes I have, And the road noise isn't that bad.
Track use: The RE-11s give you a ton of confidence and good feedback. The tires, like mentioned before, do not take long to warm up. Once they are up to temperature, they have great lateral stability. The steering response could be better, but that one tire with a 71 in it addresses that issue. At peak temperatures, I didn't really feel a cliff, or drop off in performance. They seemed to hold at a certain level of grip before letting go. When the tires let go, you're already aware of it happening (alot of that may be down to the predictability of the Z chassis).
I hope that provides more information. I've switched to the RE-71R and will have an initial track comparison after the 20th.