I should have enough wood to cut panel 9 the length of the cabinet, like others have done. I can't see any harm in this modification.
This beast will likely be painted the color of our walls (or maybe just black), and stood up on end in the corner. I have little kids, so safety straps will be used to keep it from toppling over and crushing one of them.
I've got an old AB studio power amp I'll bridge mono to drive this, hanging off a Brutefir-powered audio system. Should be fun!
Some pics...