I originally planned to wait until January or February to see how the Challengers were selling and see what was on the dealer lots.
However, I decided to grab a good deal that was offered (approx. $1,300 discount) to insure that I got exactly what I wanted- a "basic" SRT in Hemi-orange. (From past experience with Charger SRTs, I found that dealers tended to order their cars with every conceivable option to increase profits). Also, I doubt if the SRTs will be discounted significantly more that what I received.
I am happy with my decision and now only have a long 5-month wait.