If you're ok with DIY or a rather expensive pre-build cab,
fEARful may be of interest to you. They're 2-way or 3-way boxes depending on whether you want a horn. They're also designed to allow the woofer to hit x-max, so the cabinet WILL NOT fart out no matter how much power / low end you hit it with. I found a 12/6 cube on craigslist here a few years ago and longcat has been using it with her SVT-3Pro ever since; that cabinet sounds a lot bigger than its size and it only weighs 35-40lbs. You'd be getting close to your power limits with a single 12, but the 15" version should handle that no problem. The only real downside is cost; you're looking at around $600 for a kit or $1100 for a pre-built box.