My thanks to everyone for their replies to my original question. Having taken everything into consideration my decision is to purchase a low mileage, excellent condition BMW E86 Z4M Coupe with my desired options etc. (wanted ---- already posted) and as and when I successfully find the "right" car whilst being an investment it will not reside in the garage but instead will be ENJOYED, TREATED WITH T.L.C. and MAINTAINED regardless ( just like my "better half

) Thanks again for your input.