Well, the reason for swapping engines in the limited coupe was mainly due to personal preference. I will always choose a manual over an automatic, even (sometimes especially) the autostick/manumatic ones. The other reason is my dislike for the SRT6 rear spoiler. I love the profile of the boat tail rear end, in my opinion the spoiler ruins it. Then there's that "pseudo-sleeper" aspect to think about. It would come as a rude shock to the guy in the 350Z that thought he was racing a base coupe.