RE: Backup plan?
Backup plans? Sure:
If I NEED a car before the Challenger is available (not likely): '07 Eclipse
If the Challenger is too expensive (over $35K): '08 Accord Coupe if it looks as good as promised.
I would also consider the new Camaro and the Mustang, but I'd probably pick the Accord. The concept Camaro interior is too gaudy and I've had a bad history with Fords.
Heat