Well, I got a road force variation balance done today. Less of a pain in the ass, but there is still a distinctive vibration (just not as bad). So, I'm sure the axles/hub assembly(wheel bearing) were a leading factor.
SOOO... What's left, really? It would be really nice to find out that this problem is being caused by some stupid part that can be adjusted/replaced for like... $50, after spending $1000+ to figure it out.
:x ARGH :x