Vanns is going to have a limited amount of silver 3750s soon for $249 shipped. Last time I looked on their site you could pre-order. For this price and if you like silver (or can hide it) it's a steal. I owned a DPS10 which is the same sub (specs wise). It is tuned to 32hz and plays very accurately from 25hz to about 120hz. Very clean in the Classical/Jazz mode. It hits down to 20hz with great output, but alot of distortion. It doesn't sound bad, just not defined like the higher octaves.
Again if you're going to pay full price...The Hsu is a great option, but I'd go with the best of both, HT/music, in it's class, the PB10 (IMO)