MINI, or what alternative?

We want to buy a car at the end of October, where my wife absolutely wants to have the Mini R56 (One or Cooper). I also like the little one, but I would like to know what alternatives there are in this league and not simply blind buy. What do we want? – Used cars up to the maximum year 2008 – Small for the city but sufficient for holiday trips to Italy – He should be splashy & not a lame duck – Should be fun while driving and not boring – good value preservation (?) or good resale price – petrol, no diesel – price up to a maximum of 13k What did we have so far? – Polo, Golf, Lupo, BMW 320d, Peugeot 205,..