Skip the 9lb one. Leave it for the N/A guys. Youll light first up at any hit of the gas. I have a 10lb one and its perfect.Great throttle response, and revs easy, but not so rev happy that it lights up first. Yes its cool to light up first and all but its not cool when your actually trying to accelerate fast.
BTW Im talkng from experience. I had a Fidnaza 8.8lb on my DET, and swapped it out and went to a 10lb flywheel.