It's really up to you, and pretty much most combos will get you what you want. Personally I wouldn't fart around with LPG unless you are really keen on a troublesome underperforming motor that gets good milage

Your a harsh man Im planning on sticking with gas research for a while as ive invested quite abit of time and money into so far. Il be upgrading the turbo sometime next year to a gt2860rs then sending it for a tune to the gasman Jason Ghiller. If he can crack the power Im after 180-200kw atw then il be a happy hippy gas addict otherwise il look into injection