More impressions after a week or so of tooling around.
It's a grail quest to acquire the parts, but they are pretty awesome! The F damper alone is barely noticeable, but bring in the R damper, and its a much more precise and predictable handling car.
I'm due for new tires soon and going with the ultra sticky in dry BFG G Force Rivals (see here for details:
http://www.tirerack.com/tires/tests/...y.jsp?ttid=172 ), so I think the two upgrades will make me fall in deeply in love with the Z all over again quite soon