Got mine at about the same time as you Graham, although I managed to swing a Ti version
I'm really happy with mine aswell *except*
18" 235/45 tyres cost a bomb and i needed 2 right off the mark
then, while fitting the tyres yesterday evening, one of the mechanics pointed out some pretty unexpectedly established rust points on the rear suss welds and the aft exhaust bracket. On the welds it's surface but the aft exhaust bracket looks half done already. He was really shocked that it would be like this on a 2 2/1 year old car, the other guy just said "all alfas are like this" .... but I'm fairly sure that my 8 year old 156 wasn't that bad even at the end so I may get the chassis treated. perhaps the previous owner kept it by the sea.....
oh yeah, and it uses lakes of fuel, but I'm slowly adjusting to filling it twice a week instead of the once every 10 days of the old 2.4 JTD
thinking of the mangoes mod myself, not that I'm unhappy with the sound it makes, in this land of diesel alfas (Belgium) you get some appreciative looks when they hear the 6 idling, but for sure better throttle response would be welcome and, you know, more is better when it comes to noise!