I say go for it. I have the AP Racing (put together by Brake Pros, division of Stillen) 6 piston front and 4 piston rear.
Don't worry about the rusting issues with the hardware. Mine have seen Chicago winters and no issues. Some surface rust did appear on an exposed metal piece, but came off easily after washing the car. Like I said, surface rust. Most of the bolts are painted anyways (came like that).
AP makes quality calipers and rotors from England (correct me if I'm wrong). My rear rotor though is made from DBA (Australian).
---------- Post added at 02:55 PM ---------- Previous post was at 02:51 PM ----------
This happened to someone else too. The member though told me he drove his car hard.
Did you heat up the brakes more than a "typical" driver? =)
Either way, pixel8 -- call Stillen, ask for Charlie and tell him what is the price difference if you can upgrade to the two piece rotor.
It's available, you just need to ask. Go for cross-drilled / slotted if you can. I know they make a 2 piece slotted only 13" rotor for the kit.
It might be "cheaper" in the long run, as you only need to replace the rotor in the future and not the hat.
---------- Post added at 02:57 PM ---------- Previous post was at 02:55 PM ----------
$1,600 and some change is really good for a FX35/FX45 car specific big brake kit, especially a "name-brand" like AP Racing. This is in the price range of KSport. I'd get this over Ksport or OEM FX50S Akebono big brake kit.