I think you're off to a good start. I'd LOVE to see all three of those options you listed.
But I think I'd actually start with a few of the fundamentals first.
As good as the Holden chassis is, I would've really liked to see GM create a brand new chassis from scratch just for the Camaro. That might be too unrealistic in today's environment though.
The two things that keep sticking in my craw about the Camaro are the 'mail slot' at the front of the hood on the SS, and the fake gills just in front of the rear wheels. When my new SS is delivered I'll be patching over the mail slot with a slick little piece from SLP, pre-painted to match the body color.
Anyway, thanks for starting this discussion. I think it'll be cool.
RRrumbLE