Munch, I've had shelves like the one you linked to in your OP, and I *REALLY* don't think that it will support the weight of a PVM. Those shelves in particular are only meant to hold massive weight when used in a particular orientation. If you load it down in the wrong orientation, it will literally turn into a parallelogram.
If I were you, I'd just start scouring Craigslist until you find something more suitably solid.