Sorry chaps, seems the email notifications aren't working so only spotted your responses when I checked back.
Born to Run is one of the books I've read, there's also mention of barefoot running in Running with the Kenyans and a few others. It all sounds like common sense, just let your body run naturally and stop messing with your biometrics. I think if I were trying to shave seconds off a PB and my main rival had better biometrics, it might matter. But that's not my game.
The saucony sound a good option to try. Less heel strike will take the stress off the joints and keep the knee surgeon happy
How many runners when told to stop running actually stop? Its just not an option for a good few years, I'm not even 40!
Some new shoes and a softer foot strike must surely keep the joints working for a while yet.