Go for the lightest flywheel possible...lighter is better, always.

The aluminum vs chromoly debate is an internet overstatement. Chromoly is stronger, but if that strength isnt necessary for the task at hand, then whats the point? I'd love to use a chromoly pen also, but its pointless.

The Comptech alum flywheel is nice, but honestly it is a bit overpriced. I prefer Fidanza's 7lb flywheel...cheap, effective, light and durable. If you want the Comptech, it still is a very nice flywheel. Id keep it...the aluminum is more expensive if I remember right anyway.

Its not uncomfortable for the street...it just revs faster. There is no loss of low-end power or anything like that, its all a myth. It just revs faster, thats it. So when starting, you have to get used to the quicker revs. Thats it.

In terms of flywheels...dont buy the hype. Lighter is better!