Got the 1997 3.5 V6 GDI. Just clocked over 200 000km and goes like stink (100km/h in 2nd). It's an auto with tiptronic. As far as i know in the last 6 years there has never been any problems with it (had it 5 months but it belonged to the wifes uncle who used it to carry his tools around in the building trade. Being a Japanese import it is manufactured to run on 99 octane. I can only get 91 and 95 where i am so am adding octane booster otherwise she surges abit around 80km/h.
The one issue i did have with it is that it has a variable intake chamber, brilliant when it's working but the seals get brittle where the 2 spindle shafts go into the inlet manifold (the variable intake is vacume opperated). Mine had an air leak throught the 2 seals and when i went to get replacement seals i found out they only come complete with the intake manifold, approx $900 NZ plus shipping

. Took me 5 minutes to get the fittings of the end of the shafts and used 2 o'rings of the same approx size. that was in January and so far so good.
I have read up that it is a common problem and most people remove the inlet manifold and take the butterflies and spindles out and seal up the holes before refitting.
Some people are like Slinkies... not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs