I also used to have a quite heavly tunned Fiat coupe 20VT.
I do miss the way you got a massive thump in the back as the turbo kicked, and it nearlly always shocked passengers who hadn't been in the car before
The possitive is also the negative, as you don't get that frustrating lag with the 350z NA engine, and you can be much more acurate applying the throttle as the response is more instant an linear. Think the 350Z is a nice engine - it pulls really well through the rev range. Overall a much more fun driving package from my point of view