I got to drive a standard k20a2 ep3 type r and I was surprised how smooth it was. It really picked up early compared to the b16b, I can only imagine it would be a killer combo in the ek9!
Iv had my kswap going 6months now with no issues at all, I use mine as a daily driver its fantastic on fuel better than when I had my B18c EK9. It's in the process of getting a rotrex fitted so will see difference in consumption.