With out knowing your budget here are a few recommendations-

Product Category Name


High Performance - Subwoofers - Home Theater - SVS


MartinLogan - Dynamo 700 - Wireless Capable Subwoofer-Audio Advisor

I prefer non ported subs for their nice tight bass for music. But that is just a matter of personal preference. There are a lot of very good ported subs.

Rythmik Audio • Servo subwoofer products

The Rythmik subs above are a great deal and are excellent subs.

What is your budget and room size? If you are on a tight budget, then I would recommend going with a better 10" sub than a cheaper 12". You will get better bass.