RE: zero to 60 MPH times?
When looking for our Challenger, I compared the fully loaded R/Ts to the SRTs and yes, the sticker prices do come quite close.
I was tempted to push the wife for the SRT but since I already have a my Mustang GT for a streetable track car and "play-thing" and the Challenger was to fill the gap when the Mustang is away for the winter salt season and so I would not have to drive the beater 4X4 truck all winter, I also needed to consider the huge drop in MPG for the SRT for a part time daily driver.
And, the dealer admitted that it was still attempting to charge a premium mark-up on the SRTs and especially the 2009 6 speed versions of the SRTs. So we went with the manual R/T instead.