have a cheap obx ws type and it sounds really good and deep not loud at all just alot of interior noise only cost 60 from ebay but i also have a header too that helps with the sound i think
i have the same muffler on my civic before and i'd say obx makes some pretty decent mufflers i just don't think they have cat backs or anything like that... now since i'm a little short on cash still i have their greddy style muffler on my accord haha