Bigsis - regardless of what my diagnosis proves to be, people are different, so if you suspect a TMJ issue, you need to see a Max-Fac consultant.
edit - Bruxism alone can cause the symptoms you mention, so you may not have a "full-on TMJ issue". Are you in a stressful job?
Also see this link:
http://www.pprune.org/forums/4145111-post26.html
One thing I've learnt is that ear-related issues of this nature can be profoundly difficult to diagnose accurately. I've also learnt that the NHS has some of the most academically-acclaimed consultants. The only issue with the NHS is that wait... I've been treated by a few private consultants now, and conditions at the clinic were no better than NHS - it's just that I got in there pronto.
Let me put another cat amongst the pigeons: have any of you got back / spine pain issues? Despite my GP telling me it's impossible for there to be a connection, there is compelling evidence to suggest that Vertebral Subluxation Complex can cause balance / vertigo problems.
Getting a diagnosis never ends!