In GTS trim, with its glorious 4.0-litre flat-six engine, the Porsche 718 Boxster sounds amazing, is sensational to drive and is beautifully built – it’s one of the best open-top sports cars on sale. However, if your budget doesn't stretch to that, the four-cylinder versions aren't as pleasing, so it's worth looking instead at the Alpine A110 and Audi TT. Two things to note: the Boxster's reliability is pretty shocking and it's not well equipped.