IMHO if you are looking for a true sports car the 1970 to 1973 911s are the ticket.
After having driving several 911 from the 80s and the 90s I bought a 1973 RS.
The car was the same price as the used 911 cars vintage 95 and 96s.
I know for many this is too crude of a car to drive, but if the driving expieriance and the feedback to the the driver is important with no masking effects that this is the car to enjoy. I could not drive this car everyday, but when the sun is out.............
The later model years are too heavy, not responsive and just too conservative for my driving style. The newer 911s are great GT cars but not true sports cars.
This is my opinion, your milage may vary.