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