Flywheel experience aluminum vs steel?

[FETorino]

I'm getting around to swapping the TKO in my Torino. I have yet to purchase the flywheel. My current mill produces about 400 hp and 450lbs of torque. My next mill is going to step it up a lot, target is 600 hp at the crank. I keep thinking of going to an aluminum flywheel since traction is already at a premium and the situation will only get worse with more hp on tap. I'm running a 3.70 locker now with my close ratio toploader and the TKO has a much lower first gear. The lighter flywheel would give me quicker reving and be better suited for track days. A steel flywheel would be easier to drive (or so I've heard). So there are a lot of hogh hp manual trans cars here. What are you running for flywheels? What is your experience with light aluminum vs steel?