[SteveCallas]

I'd move up to the Maelstrom. When you're going to put several hours of work into designing, building, and finishing a subwoofer that you probably intend to use for several years of enjoyment, it just makes sense to spend a few extra dollars now to not have regrets later.

A plate amp will unfortunately be the weakest link of the system - I would highly suggest a beefy pro amp instead.