I dont think the price is bad at all.
5500 and you get a crank rods and pistons. If your looking at building a rb30det then your up for alot of that anyway.
Im not interested in the peak power, peak power is for spanking of with your friends with. Look at the area under the curve and see if thats bigger.
Power makes you a hero at the pub, torque makes you a hero at the lights.
This thing will be very nice to drive on the street with heaps of grunt