VW produces excellent cars both in build, quality, refinement and road handling. I have driven VW Golf 1.9TDI for one year on UK roads and never had even a single problem with this car. It is beautiful and much better than many other cars in the same league.
Polo is a base model. I have no idea about price but I am really looking forward to a Golf GTI.
Fiat is an Italian make and almost failed car in UK market. It cann't be compared with German makes.