I agree with you about the bad back and needing a smooth ride. I purchased Progressives front and rear. One of the rear failed right away and I'm waiting for it's replacement to come back but the front springs made a huge difference.
Proper tire inflation is critical also. Although everyone seems to have their own idea, I run 33 front and 35 back and that gives me good handling and good ride.
Triumph wrench at the local dealer said they have a lot of people come in with bent rims, both alloy and spoked. I would think hitting an obstacle that hard would really sting your back but he says they see them every week.
