Yeah, that is for the rear caliper although on ebay you can find the fronts new for $361 for the pair for the 4 piston brembo. IMHO I don't think that's too bad for readily available calipers with zero use and no need for a reduild or even a healthy scrubbing.
I may be in the minority as I know RL calipers are proven, I just always read how the aftermarket doesn't support our platform so I say the more options, the better.