Hey everybody, thanks so much for all the input and advice!
I finally got to handle the Supernova 14" at a store today, and I have to say that it looked and felt absolutely fantastic. It reminds me from previous experiences that a person absolutely must examine and handle a firearm personally before making a purchasing decision. I actually went to two stores, with a list of potential purchases, specifically to get first impressions. We've all been there: we sometimes fantasize and research about particular firearms for months, but after handling it and taking a sight picture just once, we end up handing the gun back to the clerk and say "meh".
I that's what happened when I shouldered a Ruger American Rimfire Woodstock for the first time to day, it was $700 before taxes; it felt clunky, bolt wasn't smooth, and the wood felt like plastic! The CZ 512, on the other hand, was $100 less, and even though it was a wood-aluminum-plastic hybrid, everything about the rifle looked and felt right. When I shouldered the rifle, everything seem to balance and fit in the right places and I didn't have to strain to get an excellent sight picture.
As for the Supernova, even though I consider it a firearm worth owning, I've decided I just can't purchase it right now. Because after I shouldered that shotgun and imagined squeezing off a round, imagined the recoil, and imagined the resulting shot pattern, I realized that I just can't provide the necessities for this firearm to thrive (i.e. a steady and affordable supply of 00 buckshot and slugs).
So I'll have to wait to for a time when my resources are more plentiful and hope that the politics won't get in the way of me acquiring this firearm in the future.
Thanks again everybody!