160-70 sounds pretty big. I think 160-60 is the max of what looks, feels, and handles right. Common size too, so tires are plentiful...
Doing new seals and oil in your forks takes only a few hours, and makes a WORLD of difference. And seals and oil cost $20-$25... I'd highly recommend it, if not just for the feeling, but also helping to prevent a crash.