Nick if your teeth rattle everytime you run over a strip in the road and you can feel every little pebble in you butt then your VX is just right.
Seriously, the ride is pretty stiff (brutal) to begin with; at least that's my experience. I'm with you, if the shocks are going out the VX would bounce up and down a few times after you hit a bump. Also, you can crawl under the VX and look at the shocks to see if they are leaking fluid.
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong, it usually turns out to be impossible to get at or repair."
-Douglas Adams, Mostly Harmless