3.7 is plenty sufficient as I've driven one and pretty reliable and is less sensitive to poorer maintenance. The turbos can last a good amount of time but they need better maintenance on average and it being used you take a bit more chance.
Better maintenance? You mean like using good oil at reasonable OCI's?
Man, if only there were a forum full of people who obsess over oil all day long. . . . . the 2.7 would be perfect for them.