Ive owned a Z and now own a SRT6. Depends what u want.. I think they are more or less the same kind of cars. Personaly i found the Z was a fun cruising car, decent response from the lights and the interior is pretty sweet, better than the SRT in my opinion. I got bored of the NA engine and didnt think it had enough power for me. The abrupt power on tap and sheer excitment of this engine is what sold me hands down, its by far a more exciting car to drive in comparison so if i was you take the leap and buy an SRT6 u wont regret it!