I took another look at the wiring this weekend and found that the shrink wrap that secured the sensor wires covered a break in one of the wires. I fixed that and my brake warning message went away.
So much for the dealership saying that I had to have a specific resistance in the circuit.
I'll probably still go back to stock pads next change though. It's not worth the noise or grabbiness to keep the Stillen/Metalmaster pads.
