Agree with Siggie about the P3's rough ride - threw my guts up on my second tactical trip - only did it twice in 2500 hours on the Nimrod: L1 and after a night out in Nimes.
Although able to out perform the Nimrod at low level, the P3 struggles getting anywhere with a decent payload, max bag you would be lucky to make FL 170 and TAS 350 ish.
Charlie - got yourself on Fincastle yet?