Yeah very impressive results Pete, im hoping for that sort of figure when i have mine maped.
Spec is nearly the same as yours..

GT25R
Piper Fast road cam
Port and polished head
Piper adjustable pully
FSE
Evil elbow
Evil down pipe
decat
magnex system
magnecore 8mm leads
induction filter
Ported inlet manifold
304cc injectors
Walbro fuel pump
Apexi boost controller
larger IC pipes
FMIC

would like to think with about 25psi max I could acheive near on 250bhp