I know its an old thread but just to add on for info, as a 16v turbo owner, i have had not much problems with the car other then normal wear and tear, as for space can carry for adults and put golf bag in the boot. Power with just changing the filter and exhaust to 2.5" from turbo and nothing else already 200++ bhp and the standard 0-100kmh time is 6.5 sec and now slightly better then that. 20vt standard is 220bhp and 0-100kmh is 6 sec standard and top speed is 250kmh while the 16vt is 240kmh standard. Who ever says that the 16vt is more expensive then a 20vt to maintain has never owned one or has direct info on either model and just guessing or quoating hearsay.
With the exhaust and filter already done, just add uprated fuel regulator and colder plugs (from 6 to 8) and plug in the chip you will be getting approximately a very safe 258bhp for everyday use. There is already 400++bhp 16v turbo's in M'sia running around so look out for them and see what they can do.