[240 2NR]

I don't believe this to be a pad issue as I stated it was a prexisting problem.  Uiuc240 has these pads with his Z brakes and has no faults with them, and his rotors still look brand new smooth (plus his warm up time should technically be higher with more mass to heat up).  I wouldn't hesitate to buy again (though in my case may try others just for comparison), the price is definitely right and they are fine on track.

The pedal is within spec for travel (measured the other night using specs in the FSM).  The pads were bed properly as far as I know (repeated medium hard stops from around 60mph without a full stop about 1 minute apart after a 5 minute warm up and plenty of cooling time after).  Again, they have been to the track and have worked fine once hot.   I really think that it is either a vacuum problem (once they are hot, mechanical effort is enough to utilize a very sticky pad, but when cold there is not enough force), or a rotor interface issue (where at high temps more conformity is possible).  I guess I will look into new rotors and hopefully it will fix the problem.

If I do get new rotors, are the pads reuseable if I sand/scuff them down?

Brembo blanks or KVR cross drilled?