Thanks for your replies...
Would a bent/out of balance wheel only vibrate under acceleration? I would have thought it would vibrate all the time...I'll check them, though. Gearbox/engine mounts was my first guess before I diagnosed and replaced the propshafts - I looked at them then, but they weren't obviously split/damaged...is there something more subtle I should be looking for?
Thanks for the info on my rear-diff backlash...that's always been a bit of a worry
I've been driving about in diff-lock without a front propshaft for the last week, waiting for it to turn up in the post...the vibration was still there, so it's definitely one of the axles/diffs or the new propshaft. The disintegrated UJ was the handbrake end of the rear shaft, oddly enough...
Thanks for your help,
-mudTerrain