Looking For A Subwoofer

Hsu 12", $512

Having said this, without EQ, smaller subs are better. Maybe even a 10" such as this one.

My Spiel:
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Subwoofer's are not plug and play.  The deeper they go the more likely to run into room interaction issues. Placement, EQ and bass traps are often needed.  If none of those are items you can spend time and money on, smaller is safer.

Best,

Erik 

JL Audio D108.  
Sounds musical because it has a flat usable frequency response and is not a one note wonder.  
Also has all the features needed for perfect integration including a continuous phase angle adjustment and speaker level inputs.  

+1 SVS SB 1000 !