Red line chaser
A few 350Z peeps I know are rolling on the TEIN HA set-up. I haven't heard any complaints and the ride isn't necessarily overly stiff, but makes the car feel "tight". One keeps his around stock height because it makes it easier going in and out of his driveway, while a couple others have theirs down about an inch all around. Feels real good to me on the street, and more damping is only a few clicks away. I've also heard good things about the JIC set-up, but don't have any experience with them though. There are a few good, high quality choices to pick from for the 350.