My bad back makes driving my current Honda S2000 painful and I now need more space, an auto box and ideally a metal folding roof. I rarely use the huge power available.

Vauxhall Twin-top is cheapest but Design version rare, auto even more rare. I've also heard rumoured quality issues with roof mechanism.

Eos has microscpic boot space when the roof is stowed and I hear some issues with leaking/rattling roof.

BMW 320SE seems best option despite price ( budget £21k )- and tax/mpg costs seem reasonable. So what's the catch when buying BMW?

Should I go for the 325 though? As auto 2-litre may seem sluggish.