It sounds like you should probably be looking at an Acura, Lexus or Infiniti. Anything European with your specified age/miles/price will be tempting fate in terms of expensive repairs. Acura's coupe/sedans are the RSX, TSX, TL, RL in order of ascending size. The RSX is 2-door; the rest are 4-door; all could be had within your ranges. Similarly, you should be able to find a Lexus in your budget as well; maybe an IS or ES sedan. And probably your sportiest option would be an Infinity G35.