Azrael,
I would have to disagree with some of your points!
V9 is not a 2.5l engine..... why? because V9 does not mean anything now, which is why people always now use the "MY XX" to identify a car. V9 for UK car does not exist.
A Newage STi TMIC is capable of 450bhp - water injection is not needed.
FMIC will not kill throttle response, if you have the right kit.
TD05 - 20g won't make 450bhp, by a long shot. The MD321T seems to be the choice of turbo at the moment, making 450bhp even on a 2ltr engine (but laggy).
Standard STi rods for 450bhp! How long are they gonna last.
Not all 2.5 set-up's are the same mate..... mine certainly is'nt and certainly never caused PowerStation a problem with temps winning the Time Attack Championship last year.