Vibrations at 60+mph

Hi,
My 97 4cyl accord has a vibration that starts at around 60 mph.It ccan be felt in the steering wheel as well as the seat,ect. So far we have changed the 2 front tires, both complete axles, wheel berings on both sides and balanced all 4 tires. Vibration still there. Any ideas???
Thanks

warped rotors perhaps

Did you lower your car, because the same thing happened to me when I dropped my car, and I got an alignment and everything was back to normal.

Alignment may be the problem, but that all depends on who's aligning it...

Did you hear any thumping noise from tire at low speed?

There was a little noise at low speed but it went away when the front wheel bearings were changed.