If I were considering a sub with a passive radiator at that price, I'd sooner get the
MB Quart Vera sub. Compare its 128lb heft, 12" driver and dual passive radiators to the GoldenEar's 32lbs, 10" driver and single passive radiator. The Quart ought to move much more air and the enclosure much stiffer.
But if you prefer a sealed sub, get the SVS. Actually, for home theater use, the PB2000 might be more appropriate.