road vibration and clunk and bang on bumps, mechanic says tight

What is your question?

I bought this vehicle brand new and never really liked the feel on the steering wheel. Always has a little vibration on the wheel over 70mph. Now that I have over 80,000 miles on it and I've put brand new tires on too there seems to be a clunking noise as I go over bumps. I live on a very bumpy road and you don't notice it on good roads just the bumpy ones. I've had 2 mechanics check it out and they say everything is tight but I don't remember it making so much clunking and banging except the last year