You might want to opt for the SRT if you feel the R/T does not have enough power for you. I have not driven a challenger so can not give an opinion, but I think the R/T will be fine for me since I am not drag racing but I also don't want a lugged down feel to the car. Just like my Dad taught me, always buy the plymouth in life since the dodge is the low end and the chrysler is expensive so always go middle of the road (old school logic).