well lemme say what street strip will be mostly street with a trip or two to the track a year, the motor isn't some torque monster, it really starts coming on at about 4000-4500.
Lite steel is very forgiving and a great choice. You get most of the lower moi benefit of an aluminum flywheel, but with much less tendency to warp and a lot less flex.
On the racetrack aluminum generally revs quicker and absorbs less power as the revs go up, but it also returns less power after the shift so it doesn't recover as well as steel. A little slippage after the shift can greatly improve recovery, but with aluminum you have to be careful as less thermal capacity means it's a lot easier to overheat/warp the insert.