have you found a place yet? I am in the process of getting my car uprev'd at S&R performance (google them for location). First round was a let down because of a number of reasons resulting from the Osirus license causing a delay and the resulting fail to tune. (not S&R nor their tuner)
As an FYI, they just completed a 600hp plus g35 turbo, a 2011 nismo single turbo, a multitude of subies, srt8 grocery wagon plus they run a 911 on the road coarse. They should be able to accomodate your needs.
Welcome to S&R Performance - It's what we do.
also look them up on facebook.