Volvo Repair: purchase advice, volvo 850 turbo wagon, mileage car

Question
Thanks for any advice.
I'm considering buying a used 94 volvo 850 turbo wagon. I have located two of them, but I'm not sure which is the best deal.
One has 100K and has had no major work other than routine maintenance. The other has 78K and other than routine maintenance has had the turbo and AC replaced. Which would you buy? My thoughts are that since the 78k one has had these items replaced, then those parts should last longer than the same parts on the 100k car since they are original. Although, others have told me that the turbo should last well beyond 78k and perhaps this car is a lemon?
What do you think?(I realize your advice is not binding in any way.)
Thanks

Answer
Well i would suggest that a properly maintained turbo will last quite a while, up over 100k. miles. so my suggestion would be that the lower mileage car has probably had less maintenance or not as good as the 100k. if you really want to make an informed decision, you should call your local volvo dealer, or volvo specialty shop. they can give you the best advice. for a check out fee *(usually one labor hour) they can evaluate the cars current condition.