i personally love the 2j...its awesome..
but in real life i have a little example for u. basically comparing a rb25det to a 1jz 2.5ltr single turbo.
with exhaust and 10psi i got 256hp, and a mate with the equilivant toyota engine with exhaust and 16psi got 230hp.
now when comparing nissan to toyota, nissan definitely got it right.
but u gotta love those 2j's