I am running that setup with a VF30 turbo and an EXTREMELY conservative Ecutek tune. 92 octane.
On a Mustang Dyno I was right at 270Whp and 270 torque at 17-18 psi. Stock STi is getting 230Whp on this dyno. There is quite a bit of boost taper (down to 13-14psi IIRC) at the top, so I will be looking into a larger turbo towards the middle of the year. I have full boost by 2.8-3k.
Not big numbers, but the car is a blast to drive and I am happy with it.