Update:
I got a good deal on a brake kit for the fronts from a forum member who wasn't able to use them because of his class requirements. They are actually for the WRX 03+ with the caliper brackets for the 08+ which fit on the BRZ. They are only the 4-pot calipers and the rotor diameter is only 12" (compared to the stock 11.5"). However, they shave 16lbs per corner. There was one exception to this kit, the bolts supplied don't work with the bracket, you'd have to order the 08+ specific bolts (the kit came with the rotors, etc). The Part# is 230-10425 (I will update after I get them on to confirm, also ordered #230-10646) for those interested. I will review after I get the new bolts in and get them put on, but here are a few pics:
Kit part #
140-9193
The kit:

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Install turned test-fit: