Hi Niko,
The 3200 is a very special car, some parts are difficult to find, needs a specialist mechanic who really knows these cars to service it and it is expensive to maintain. Despite the above when these turbos kick in it is something else, very visceral and raw and the car is stunning inside out. I had mine for 2 and a half years now and I love the car.
The 4200 is a very different, probably more reliable, naturally aspirated Ferrari engine, and not as beautiful as the 3200-no comparison..
So it depends on your taste.
If you go for the 3200 the automatic is very friendly in the city and suits the car generally.
Make sure that there is an expert mechanic that knows these cars to service it, I an sure there will be someone in Athens.
Also by the best you can find, don’t by a cheap 3200, as the cheap ones need a lot of work and work on these cars is usually expensive.
if you go a 4200 , get a gransport
Christos