Save your money. The 1.2 Puretech 130 bhp has plenty of performance and excellent fuel economy. Adaptive suspension does give that magic carpet ride, but the other models do not have it and it is not even an option.
I do like my C5X, however what really niggles me is Citroen yet again doing one over the British. In addition to the usual fusebox in the glove box, which they can't be arsed to move to the driver's side: The additional controls that they added to inner side of front passenger seat on LH drive models to allow driver and rear passengers to adjust its position, we're not deemed worthy to have them. The ambient strip light stretching from door to door along middle of dash that's fitted on LH models, you guessed it... I must possess a certain amount of madness for being loyal to Citroen over many years when they treat us with so little respect. Other European countries receive a 5 year warranty where we receive the obligatory three! I've decided, my next car will be German!