I've had my car (1990 964 C4) for over 6 years, It's be a great car with killer performance for it's year and awesome MPG, around 30 at 75mph. There great cars with lots of parts to upgrade. I purchased it from a Porsche dealer (smart when ever possible). They had all the records (1 owner) and the car had been serviced by them the entire time, previous owner drove it instead of a lot of 911 owners who just rub it with a diaper, my car had some milage on it. Not high for the year, about 90K. I've had lots of 911's over the years & I think (964's) are the most fun for the $. Buy a car that has great records, miles aren't that big of an issue, especially if your going to enjoy it as I do!
This car exceedes the performance of all previous Porsches by a wide margin. It is a blast to drive and turns in 26 mpg on highway runs (if kept under 80mph). The brakes are fantastic. The AWD system almost fully makes up for the rear weight bias. The engine sounds much better than the new water-cooled jobs, too. The real deal. I had a fuel pump relay go bad once, and an A/C leak, but other than that, the car has been very reliable and capable of absorbing relentless abuse.
With a half dozen years of ownership, I have to say that this is one great car. It does everything well and rewards the true enthusist with performance and personality. Engine, clutch, brakes, transmission are bullet proof. Amazing reliabity in the running gear, but HVAC is an engineering absurity. I mean, why pump hot air from the engine when you could just run the hot oil (already passing by) through a 3-way valve and coil under the dash? And how many yards of leaky refrigerant hose do we have as it runs from one end of he car to the other? And those 5 servo motors in place of a few manual slide valves? Sorry. The HVAC is dumb.
I have had my Targa for 3 years and it's a pleasure just to take the car out on weekends and explore neat places for the day or overnight. It handles perfectly on the interstate as well as the back country roads. Luggage space is more than enough for the overnighters, so there's no worry about limiting what you want to take due to lack of room. The leg room is fantastic and when the Targa top is down, you feel like a million bucks cruising down the Interstate at 80 (oppps 70). I like the handling at all speeds, especially the way it hugs the road on sharp turns... although high performance tires are a must. Lastly maintenance is minimal but I service the car like clockwork!