The epitome of mid-engined Ferrari design is the 308/328 series. The 355 and the 360 are its natural evolutions for the more modern era. The 348 and the current 430 are deviations and they don't look that clean and good.

Similarly the 60s Daytona defines the front-engined Ferrari. This is why the 599 looks great whereas the 400, the 456 and the 612 are poorer shapes.