Had a 150 myself, sold it with 71k on the clock.
Problems I had go wrong, FLY Wheel went, (supposed to be common problem), also replace the clutch. All under the warranty thank god.
Other than that to me it was a cracking car, to me the engine was lovely and quite compared to some 5 speed 130 brake Passats.
Again MPG was unreal usually about 53Mpg. my vRS TDi is getting approx 44.6. currently only 12k on t so it may lossen out a bit more later.
I remember when i bought the PD150, there were like gold dust with only 5 at the time of looking but of course when i was selling the garages gave me the usual rubbish that ohh the engine is to powerful and won't suit many people. Of couse they said then i would get a better price for the 130. you're goused either way with the garages.
but anyway both should be a cracking car for you. as in the other post above there is now loads of them, too many imports too though so look out if i was buying one again i would really be doubling checking everything. Make sure you buy the 03/04 model if possible as these came with a lot of VW fitted extras. Alarm, CD , extra head rest.
Bottom line for me Go for the PD150, usually pushing out approx 160+ as apposed to advertised 150 depending on what roling roads you believe. ;-)