For a subwoofer, I take the necessity of quality and accuracy as a
given. There are plenty of competitive companies with excellent
offerings. The biggest differences tend to be in size and cost. When
I'm buying $400/pair bookshelf speakers for a bedroom or study,
I still want high-quality sound, but I also don't want to spend $1000
on a subwoofer or have a sub that could be mistaken for an end-table.
I ended up choosing an Onix UFW-10 for my living room (a good balance
of sound, price, size, and appearance). The new Onix X-sub is quite
tempting for my office or bedroom.