What motor is this BTW? 2.5 Liter? Not many of those around except the QR25. And if you don't want to change anything at all...stock compression will be fine.

You can however up the compression to 10:1 and you response will be better. It's ultimately your decision. Since you're already at higher than 9:1 I would personally up it to 10:1.

Better response will be more productive than 1 or 2 extra pounds of boost.