Subwoofer Question: Active or Passive?

Looking for most musical sub to fill the lower end of my Totem Arros. My budget is $500 at most new or used and my stereo amp does not have sub out. I need quick fast tight bass and read, most likely 10" with good amp should suffice. Should I buy a active sub or a good amp and passive box seperately from Audiogon or Ebay. Please give some brand recommendations