PE = Parts Express. Probably talking about the Dayton Sub-120.
IMO, the eD A2-300 blows away every other sub listed. Then the Bic H-100 (I wouldn't even consider any other Bic sub), then probably the Velodyne.
Never heard the Famous Maker/Hsu one, although the Bic H-100 had Dr. Hsu's input, too, and I believe shares the amp with one of the smaller Hsu branded subs.
Don't believe everything on the Interwebz! A duck's quack DOES echo!