I finally got around to watching V/H/S and Piranha 3DD.
V/H/S was excellent - really quite good. Definitely a favorite.
Piranha 3DD was terrible, but sort of fun, in a please-let-them-die-oh-good-but-the-effects-robbed-me-of-the-pleasure kind of way.
And of course, I only bought one of these before I saw either, and it turned out to be the one I like least... darn.