Ford Figo vs VW Polo vs Fiat Grande Punto ,which one to buy ?

I am totally confused about these cars, I am not able to take the decision for which one to buy.I would like to have diesel variant . I couldn't make out which one is best.My priorities are speed, quality,space.please if anyone can help on this that which one is best,and which one can give full value to money spent.also,suggest if any other car in same price range has the better qualities.