I'm in the fortunate position to be able to spend £50k-£60k on a sports car which will be our third car and therefore used only as a treat. Ideally, I'd like to buy something that won't depreciate too much in a couple of years' ownership at about 5,000 miles a year. I ran a Porsche 911 a few years ago and I'm not particularly keen to have another. The fun element is our priority, with reasonable running, service, maintenance costs. What would you suggest?