One of the guys on here was running 10.5+ static compression in his 3SGTE. He said it made it really drivable on the street with great low down responsiveness.
Obviously if you do this you can't pump as much boost into it to make the big HP figures.
Its always going to be a trade off between power and response but you probably want to stick in the 8.5 - 10.5 static range. If its going to be a dedicated track car, the power is probably going to be more important to you so you'd want to go lower in the static compression and then probably source a close ratio box to keep it on song.
See if you can get hold a a book called "Forced Induction Performance Tuning" by A. Graham Bell. It has a discussion on Compression Ratio vs Boost as well as lots of other helpful information on tuning and building turbo and super charged engines.
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