ok, now I will throw a wrench in here....
what about STI manifolds? From what I understand, the 04+ STI manifold is the same. There is some doubt on the 06-07s, but I believe they MIGHT be the same as the 04-05s.
The reason I ask is, I have a p'n'p/coated set of manifold I am about to put on from an 06 STI. I also have the STI crosspipe. I did NOT try them on the car first, but from what I can find the 06 STI and WRX have the same shortblock. Jeremy from Crucial recommended NOT P'n'P the 06+ WRX manifolds, as they are thinner.
BTW, if I had know about your services first I may have gone with you, as you seem to be a bit cheaper foir a P'n'P and coating