I agree, with the contour running such low boost levels there is no need whatsoever for a Greddy e-01. I wanted one for my 18psi sentra and didn't get it. I went with the $200 cheaper Profec B and it is an awesome unit. You can see it here:
It is the blue unit. The silver is a greddy turbo timer and the deck above them is an eclipse.
Please no bullcrap on my Tach! It was free.
Brent