Completely new to subwoofers here, I'm looking to add a sub to my pair of Beolab 3s. While they sound decent (very good for the little amount of money I paid), they lack in bass, and I will be moving to a larger apartment, which only amplify the problem. I listen to Jazz and Electronic music, so I'm looking for a good balance between tightness/accuracy and earthshaking rumbles, and I'm willing to pay up to the $900/1000 mark. Any suggestions?