I ordered the HKS midpipe for $120. Then I learned that it's alumilized steel and hangs too low. So I canceled the order and bought the Blitz midpipe. It's about $160, but well worth the $$.
It's 100% stainless steel, excellent quality, and it's 80 mm diameter is also larger than the HKS. Not sure about the SC300 fitment, but I had to have a custom stainless O2 flange made for the midpipe.