I have the JWT oil pan spacer but my tap-off is still from the main sump as there were various concerns in the US of the oil not flowing correctly, or something like that, so I went for the Vortech approved method.
Agree with the realistic figures (395bhp, 4.9sec 0-60), but it will be noticable.
Not sure I follow the low-down torque comment; I saw no difference when going Nismo to true dual. Seperately, I got Abbey to retune my SS box to give me as much mid-range grunt as possible, which in effect was only a moderate difference.