lol @ shaz, dont worry about it mate, you only live once...
The FMIC will set you back around £300ish, even the ones from States on Fleebay are good, seen few exactly same as mine from HK too that will set you back around £260 delivered - dont be put off by it being from HK because you'll find some UK sellers both on fleebay and websites selling exactly the same FMIC but £100 more...
Me personally would choose a Panel filter (Piper/K&N/ITG £35ish), induction systems tend to give off the chavvy 'whhhossssh-pisssssssssss' with the diverter valve espically the forge/HBoost and with our engine setup the induction suck in some serious heat unless you route it towards the bottom but then you dont wanna be getting it wet...
K04 Turbo - well theres a variety of the K04, PM 'Docurly' , he'll guide you into which one he has. Your looking anything from £350 - £700, a wide price range depending who's selling it and whether Brandnew or refurbed.
Injectors will take you back anything from £70 odd to £150 depending again who is selling them then finish it with a Custom Map
......just before you have a uprated Exhaust fitted.
That should give you an idea mate....
....oh and then you should consider Uprated Clutch Bigger brakes to stop you from all that power. If I think of anything else ill let you know,haha..